CCNA 3 exploration - Final Exam (update - 1)

1
In a three-layer hierarchical network design, which distribution layer function delineates broadcast domains?
routing between VLANs***
aggregating traffic flows
providing redundant links
reducing the network diameter


2
What two methods can be used to remove MAC address table entries from a switch? (Choose two.)
Power cycle the switch to clear all dynamically learned addresses. ***
The clear switching-tables command will remove statically configured entries.
The clear mac-address-table command will remove statically and dynamically configured table entries.***
The erase flash command will clear all statically configured table entries.
Statically configured MAC addresses will automatically be removed from the address table 300 minutes after the last activity on a switch port.




3
Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal?
only hosts A and B
only hosts A, B, and C ***
only hosts A, B, C, and D
only hosts A, B, C, and E


4
What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?
automatically detects duplex settings
automatically detects interface speed
automatically detects copper cable type ***
automatically assigns the first detected MAC address to an interface


5
Which three statements are correct concerning the default configuration of a new switch? (Choose three.)
It is configured in VTP server mode.***
STP is automatically enabled. ***
The first VTY line is automatically configured to allow remote connections.
VLAN1 is configured with a management IP address.
All switch ports are assigned to VLAN1. ***
The enable password is configured as cisco.


6
While configuring a new switch, a network administrator configures the switch as an HTTP server. What benefits does this configuration provide?
This allows the switch to host web pages for the network.
This allows remote VPN connections to the switch over the Internet.
This is required if a web server or web farm is attached to the switch.
This allows web-based configuration tools to be used with the switch. ***
7
Refer to the exhibit. The configuration steps that are listed in the exhibit have been entered in switch S1 via the console. Subsequent attempts to telnet to the switch are not successful. What is causing the problem?
The switch must be configured with SSH version 1.
The transport input command must specify Telnet access. ***
The RSA keys must be returned to zero before SSH will permit Telnet access.
The ip domain-name command must also be entered in line configuration mode for the vty lines.


8
What is a possible impact of setting too short an aging time in the MAC address table of a switch?
overly large address table
unnecessary flooding of packets ***
excessive timeouts of static addresses
impaired ability to dynamically learn new addresses
9
Refer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?
This entry can only be removed from the MAC address table by a network administrator.
When forwarding a frame to the device with address 0060.5c5b.cd23, the switch does not have to perform a lookup to determine the final destination port.
Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to port Fa0/18.
The switch learned this MAC address from the source address in a frame received on Fa0/18.***
10
An administrator is troubleshooting a PC on the network which is suffering from slow and intermittent connectivity. The PC has a ping success rate to the default gateway of less than half the ping attempts. Other PCs on the switch can consistently ping the default gateway. The switch port is configured for auto duplex and the PC is configured for full duplex. What will commonly cause this problem?
The PC is set to full duplex. The switch port fails to autonegotiate the duplex setting and defaults to half duplex, which causes a duplex mismatch. ***
The switch traffic is exceeding available frame buffers. The result is that frames are being dropped.
The PC and the default gateway have different bandwidth Ethernet ports.
The default gateway is not on the same switch that the PC is.
11
Using the command copy tftp:backup.cfg startup-config, an administrator downloaded a saved configuration from a TFTP server to a switch. Why does the administrator not detect any changes in the switch configuration after the download completes?
The command should have been copy startup-config tftp:backup.cfg.
A backup configuration from a TFTP server cannot be copied directly into the startup-config.
The command copy running-config startup-config should be used to save the changes on the switch.
Downloading to the startup-config requires the switch to be reloaded in order for the configuration to take effect. ****
12
Refer to the exhibit. The teacher host is connected to port Fa0/7 on switch STW. A student has decided to share access to the Internet by attaching a hub and laptop to STW as shown. What will be the result of the student making this connection?
The Fa0/7 port of STW will be shutdown.
The student will gain full access to the Internet.
Both the teacher and student will be able to receive data but only the teacher will be able to send.
The frames from the laptop will be dropped, but the teacher host will maintain connectivity with the network. ***
13
Why is it advisable that a network administrator use SSH instead of Telnet when managing switches?
SSH uses TCP whereas Telnet does not.
SSH encrypts only the username and password when logging in.
SSH encrypts all remote management communications whereas Telnet does not. ***
SSH sends a clear text message steam which reduces the bandwidth use for management.
14
Refer to the exhibit. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol. All inter-switch links that are shown are trunks. Whenever an inter-switch link fails, the network takes nearly a minute to completely converge. How can the convergence time be reduced?
Increase the capacity of the distribution and core trunk links to 10 Gb/s.
Add a trunk link that directly connects D1 and D2.
Use Layer 3 switching on the core switch.
Implement Rapid Spanning Tree Protocol. ***
15
Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology?
Cat-A
Cat-B
Cat-C ***
Cat-D


16
Refer to the exhibit. How is port Gi1/1 on SWT-A functioning in the spanning-tree topology?
It is sending and receiving data frames.***
It is receiving BPDUs, but not sending data frames.
It is participating in the election process by forwarding the BPDUs it receives.
It is receiving BPDUs and populating the MAC address table, but not sending data.
17
Which value determines if a switch becomes the central point of reference in the spanning tree topology?
lowest bridge ID ***
highest revision number
lowest numeric IP address
highest numeric MAC address


18
What is the purpose of the Spanning Tree algorithm?
It propagates VLAN configurations to other switches.
It restricts broadcast packets to a single VLAN.
It segments a network into multiple broadcast domains.
It prevents loops in a switched network with redundant paths.***
19
Which STP port type can only appear once on a segment, and must be present in order for traffic to flow on that segment?
non-root port
disabled port
designated port ***
non-designated port
20
Which type of traffic can still be received on a switch interface that is in STP blocking mode?
BPDU frames ***
multicast frames
broadcast frames
Layer 3 packets
21
Refer to the exhibit. Each switch is configured to participate in STP for VLANs 1, 10, 20, and 30. Which switch will become the root for VLAN 20?
A
B
C
D ***
22
Refer to the exhibit. All edge ports are configured with the spanning-tree portfast command. Host1 is recently connected to port Fa0/1 on switch SW1 . Which statement is true about the status of port Fa0/1?
The port will transition into blocking state.
The port will transition immediately into forwarding state.***
The port will transition into blocking state and then immediately into forwarding state.
The port will transition into blocking state and immediately transition through the listening and learning states.
23
Which statement describes the use of voice VLANs in Cisco IP telephony?
The voice VLAN carries both tagged and untagged traffic.
The voice VLAN carries untagged traffic having special QoS markings.
The voice VLAN must be configured on the switch port to which the IP phone attaches.***
Data and voice frames are tagged with same VLAN ID between the IP phone and the switch when a voice VLAN is configured.
24
Refer to the exhibit. All trunk links are operational and all VLANs are allowed on all trunk links. An ARP request is sent by computer 5. Which device or devices will receive this message?
only computer 4
computer 3 and RTR-A***
computer 4 and RTR-A
computer 1, computer 2, computer 4, and RTR-A
computer 1, computer 2, computer 3, computer 4, and RTR-A
all of the computers and the router
25
What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?
only the management VLAN
all VLANs except the extended range VLANs
all VLANs except 1 and 1002-1005
all VLANs ***
26
Refer to the exhibit. What would happen if the network administrator moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch SW1?
Host A remains a member of VLAN 10, because the router is routing traffic between VLANs.
Host A is no longer a member of VLAN 10, because port Fa0/3 has been manually assigned to VLAN 30. ***
Host A remains a member of VLAN 10, because the switch provides dynamic VLAN assignment for the port.
Host A maintains connectivity to all members of VLAN 10, because it is connected to the same physical network.
Host A is no longer a member of VLAN 10, but because port Fa0/3 was unused, it is now a member of VLAN 1.
27
Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts B and D cannot ping each other. What is the most likely cause of this problem?
The link between the switches is up but not trunked.
The Fa0/11 interface of Switch1 is not configured as a trunk.
Hosts B and D are configured with IP addresses from different subnets.***
VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.


28
Refer to the exhibit. What is true of the configuration of switch S1?
A Cisco proprietary protocol is in use for ports Fa0/1 and Fa0/3.
Switch ports Fa0/1 and Fa0/3 have been configured with the switchport mode access command.
Untagged frames received on ports Fa0/1 and Fa0/3 will be placed on VLAN 1.
Switch ports Fa0/1 and Fa0/3 are configured to carry data from multiple VLANs.***
29
Refer to the exhibit. How does SW1 manage traffic coming from Host A?
SW1 drops the traffic because it is untagged.
SW1 leaves the traffic untagged and forwards it over the trunk. ***
SW1 tags the traffic with the lowest VLAN ID value and forwards it over the trunk link.
SW1 encapsulates the traffic with 802.1Q encapsulation and forwards it over the trunk link.
30
Refer to the exhibit. Which two statements are true about the operation of the interfaces? (Choose two.)
Incoming traffic with VLAN ID 0 is processed by interface fa0/0.
Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.***
Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is down.
Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to the hardware address.
Traffic inbound on this router is processed by different subinterfaces, depending on the VLAN from which the traffic originated. ***
31
Refer to the exhibit. A company has acquired a new office in a campus environment. Switches in the existing office and the new office are directly connected by a trunk link. The VLANs and IP addressing are setup as shown in the exhibit. The computers in each office are not able to ping each other. What will fix the problem?
Use an access link between S2 and S3.
Connect S2 and S3 to a common router.***
Set the subnet mask in the new office to /24.
Configure the new office default gateway to 172.17.10.1
Change the port assignments in the new office to a different VLAN.
32
Refer to the exhibit. If switch SW1 is configured with the four VLANs as shown in the exhibit, how many physical interfaces are needed on router R1 to configure inter-VLAN routing using subinterfaces?
zero
one ***
two
four


33
Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.161. What will the router do with this packet?
The router will drop the packet.***
The router will forward the packet out interface FastEthernet 0/1.1.
The router will forward the packet out interface FastEthernet 0/1.2.
The router will forward the packet out interface FastEthernet 0/1.3.
The router will forward the packet out interface FastEthernet 0/1.2 and interface FastEthernet 0/1.3.
34
A network administrator configures a switch port with the command switchport mode dynamic auto. What is the resulting behavior of the switch port?
The switch port is able to trunk if the remote switch port is set to auto.
The switch port is able to trunk if the remote switch port is set to desirable.***
The switch port will be disabled if it is unable to successfully negotiate trunking.
A successful trunk will be established if the remote switch is non-Cisco but the port is configured for trunking.
35
Refer to the exhibit. Which three options correctly identify information that could be associated with this output?(Choose three.)
Interface FastEthernet3/0/0 is subinterfaced. ***
A non-proprietary trunking protocol is in use. ***
The configuration is appropriate for a router-on-a-stick network design.
A shutdown command has been applied to interface FastEthernet3/0/0. ***
Interface FastEthernet3/0/0.3 is mapped to the default management VLAN.
An IP address should be applied to FastEthernet3/0/0 for correct data routing.
36
Refer to the exhibit. Users complain that they do not have connectivity to the web server that is connected to SW1. What should be done to remedy the problem?
Allow all VLANs on the trunk link.
Configure VLAN 100 as the native VLAN for SW1.***
Configure the trunk port in trunk mode on SW1.
Attach the web server to a router and configure inter-VLAN routing.
37
Refer to the exhibit. A new host needs to be connected to VLAN 1. Which IP address should be assigned to this new host?
192.168.1.11 /28
192.168.1.22 /28 ***
192.168.1.33 /28
192.168.1.44 /28
192.168.1.55 /28


38
Refer to the exhibit. A network administrator has segmented the network into two VLANs and configured Router1 for inter-VLAN routing. A test of the network, however, shows that hosts on each VLAN can only access local resources and not resources on the other VLAN. What is the most likely cause of this problem?
Switch port Fa0/1 is not trunking. ***
Router interface Fa0/0 is possibly down.
No routing protocol is configured on Router1.
One of the router subinterfaces is possibly down.
39
Refer to the exhibit. The network administrator has just added VLAN 50 to Switch1 and Switch2. Hosts A, B, C, and D are correctly configured with IP addresses in the subnet range for VLAN 50. Host A can communicate with host B, but cannot communicate with host C or host D. What is the cause of this problem?
There is a native VLAN mismatch.
The Fa0/11 interface of Switch1 is not configured as a trunk.
The link between Switch1 and Switch2 is up but not trunked.
VLAN 50 is not allowed on the trunk link between Switch1 and Switch2. ***
40
Which configuration changes will increment the configuration revision number on the VTP server?
configuring trunk links on the VTP server
configuring or changing the VTP password
configuring or changing the VTP domain name
configuring or changing the VTP version number
configuring or deleting a VLAN or creating a VLAN name ***
41
The network administrator wants to configure a switch to pass VLAN update information to other switches in the domain but not update its own local VLAN database. Which two steps should the administrator perform to achieve this? (Choose two.)
Reset the VTP counters.
Configure VTP version 1 on the switch.
Configure the VTP mode of the switch to transparent. ***
Verify that the switch has a higher configuration revision number.
Configure the switch with the same VTP domain name as other switches in the network.***
42
Refer to the exhibit. VLAN 10 has been configured on the VTP server. Users who are assigned to VLAN 10 are connected as shown in the exhibit. On the basis of the outputs that are provided, which group of users will be able to communicate with the users on VLAN 10 on SW1?
all the users who are connected only to SW2
users on VLAN 10 who are connected only to SW3***
users on VLAN 10 who are connected only to SW4
users on VLAN 10 who are connected to both SW3 and SW4


43
Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both switches with VTP, but S3 is unable to propagate VLANs to S2. What could be the reason for this?
The VTP configuration revision is different on both switches.
The VTP domains are different on both switches. ****
VTP pruning is disabled.
VTP v2 is disabled.
44
Refer to the exhibit. The VTP domain has been configured as shown in the exhibit. The network technician accidentally configured the VTP server as a VTP client. After the technician reloaded the switches, all users in the VTP domain started to complain that they lost connectivity to the users on the same VLANs that are connected to other switches. What should be done in the future to prevent losing all VLAN configurations in a VTP domain?
Configure all switches in VTP transparent mode and copy the VLAN configuration into flash.
Configure all switches in the network as VTP clients and copy the VLAN configuration into NVRAM.
Create a new domain and configure a second switch as a VTP server to take over in case of a primary VTP server failure.***
In the same domain, configure a second switch as a VTP server to take over in case of a primary VTP server failure.
45
Refer to the exhibit. Which two settings show the default value of VTP configuration on a Cisco 2960 switch? (Choose two.)
revision number***
existing VLANs
operating mode
domain name
pruning mode ***
46
What are two benefits of the IEEE 802.11n standard over the IEEE 802.11G? (Choose two.)
requires less equipment
provides improved range** *
permits increased data rates***
has a single-input and a single-output
needs no hardware upgrade for compatibility
47
Which parameter is used to uniquely identify one wireless network from another?
SSID ***
OFDM
WEP
DSSS
48
Which security protocol or measure would provide the greatest protection for a wireless LAN?
WPA2 ***
cloaking SSIDs
shared WEP key
MAC address filtering
49
Which method establishes an administrative connection for configuring the Linksys WRT300N wireless access point?
Associate with the access point and then open a HyperTerminal session with the access point.
Physically connect to the access point and then reboot the computer to launch the configuration software.
From a computer in the same IP subnet as the access point, enter the default IP address of the access point in a web browser. ***
Modify the TCP/IP properties of the computer connected to the access point so that it exists on the same network, and then reboot your computer to establish a connection.
50
Refer to the exhibit. Users A and B are reporting intermittent connectivity problems. Pre-installation surveys showed strong signal strength from the AP locations to the client locations. Outside electrical interference has been eliminated. What will fix the problem?
Relocate the APs closer to each other.
Increase the distance between the clients.
Change the channel on AP-B to 6 or 11.***
Place AP-A and AP-B on the same wireless channel.

CCNA 3 exploration - Final Exam (update - 2)

1.Refer to the exhibit. A network administrator needs to add IP phones to the network. To which devices should the IP phones connect?
AS1 and AS2***
DS1 and DS2 DS1,
DS2, and CS1 AS1,
AS2, DS1, and DS2


2 What advantage does cut-through switching provide?
It enables QoS It forwards frames quickly.***
It provides an analysis of frames.
It allows reduction of traffic by using error checking to drop corrupt frames.


3 Which switch forwarding method should be used on a network that employs frame
classification based on an assigned Quality of Service (QoS) value? cut-through fast-forward fragment-free store-and-forward***
4
Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal?
only hosts A and B only hosts A, B, and C***
only hosts A, B, C, and D
only hosts A, B, C, and E
5
Refer to the exhibit. The network consists of four hubs and a switch. The hosts connected to each hub are assigned addresses in the respective VLAN as shown. PC1 on VLAN 1 becomes infected with a virus and initiates a continuous IP broadcast. Which hubs will receive the broadcasts?
Hub A
Hubs A andB
Hubs A and C***
Hubs A, B, C, and D


6 Which three statements are correct concerning the default configuration of a new switch? (Choose three.)
It is configured in VTP server mode.***
STP is automatically enabled.***
The first VTY line is automatically configured to allow remote connections.
VLAN1 is configured with a management IP address. All switch ports are assigned toVLAN1.****
The enable password is configured as cisco.


7 What will be the effect of the command S1# copy system:running-config tftp://172.16.2.155/tokyo-config?
The IOS will be copied to the TFTP server.
The configuration file named tokyo-config will overwrite the startup configuration file on S1.
The running configuration file on S1 will be saved via TFTP to a file named tokyo-config.***
The contents of NVRAM on S1 will become the startup configuration file on the tokyo switch.
8
Refer to the exhibit. The network administrator wants to allow both SSH and Telnet connections to Switch1. However, the SSH connections fail. What is the most likely cause of this problem? The RSA key has been removed.***
SSH has been configured on the wrong line.
The transport input command is applied incorrectly.
The domain name has been configured in the wrong configuration mode.


9 What is the benefit of the auto-MDIX feature on a Cisco Catalyst switch?
dynamically assigns a new management VLAN ID
autonegotiates IP address information for initial management connections
allows the use of straight-through patch cables regardless of connected device types***
places a port immediately in the forwarding state to reduce the time for the spanning tree to reconverge
10
Refer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?
This entry can only be removed from the MAC address table by a network administrator.
When forwarding a frame to the device with address 0060.5c5b.cd23, the switch does not have to perform a lookup to determine the final destination port.
Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to port Fa0/18. The switch learned this MAC address from the source address in a frame received on Fa0/18.****
11
Refer to the exhibit. The teacher host is connected to port Fa0/7 on switch STW. A student has decided to share access to the Internet by attaching a hub and laptop to STW as shown. What will be the result of the student making this connection?
The Fa0/7 port of STW will be shutdown.
The student will gain full access to the Internet.
Both the teacher and student will be able to receive data but only the teacher will be able to send.
The frames from the laptop will be dropped, but the teacher host will maintain connectivity with the network.***


12 Which statement regarding the service password-encryption command is true?
The service password-encryption command is entered at the privileged EXEC mode prompt. The service password-encryption command encrypts only passwords for the console and VTY ports.
The service password-encryption command encrypts all previously unencrypted passwords in the running configuration.***
To see the passwords encrypted by the service password-encryption command, enter the no service password-encryption command.


13 A network administrator enables sticky learning on all access mode interfaces of a Catalyst switch, saves the configuration, then connects hosts to the switch. After the switch operates for several days, the administrator reboots the switch without saving the running configuration. What is the result?
All previously learned MAC addresses are lost.***
The switch reverts to non-sticky dynamic learning.
Connected hosts are no longer able to communicate with the switch.
Previously learned sticky addresses are retained in the switch configuration.


14
Refer to the exhibit. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol. All inter-switch links that are shown are trunks. Whenever an inter-switch link fails, the network takes nearly a minute to completely converge. How can the convergence time be reduced?
Increase the capacity of the distribution and core trunk links to 10 Gb/s.
Add a trunk link that directly connects D1 and D2.
Use Layer 3 switching on the core switch.
Implement Rapid Spanning Tree Protocol.***


15 What is a result of improperly implementing a network with redundancy at Layer 2?
an increase of unicast and multicast errors at Layer 3
a decrease in the amount of broadcast traffic
end device malfunction because of broadcast storms***
an increase in throughput at all points in the network


16 Why is it important that the network administrator consider the spanning-tree network diameter when choosing the root bridge?
The network diameter limitation is 9.
BPDUs may be discarded because of expiring timers.***
The cabling distance between the switches is 100 meters.
The network diameter must be set to the number of meters of the cable between the root bridge and its farthest connected switch.
17
Refer to the exhibit. What does "FORWARDING" mean in the command output shown?
The switch is sending and receiving data frames.-***
The switch is receiving BPDUs, but not sending data frames. The switch is participating in an election process by forwarding the BPDUs it receives. The switch is receiving BPDUs and populating the MAC address table, but not sending data.


18


Which device or devices should have the Spanning Tree Protocol enabled to prevent host traffic from creating a broadcast storm?
Core_S1 Access_S2 and Access_S3
Core_S1, Access_S2, and Access_S3****
Core_S1, Access_S2, Access_S3, and R1
19
Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology?
Cat-A Cat-B Cat-C Cat-D***
20 RSTP is enabled in a switched network that is active and converged. Which switch port type assumes a discarding state on non-root switches? root port edge port alternate port*** designated port
21 In the implementation of PVST+ in a specific VLAN where all switches have default spanning tree priorities, which spanning-tree command setting could be assigned to force one of the Catalyst switches to become and remain the root bridge? root primary-*** priority 8192 priority 2048 spanning-tree mode rapid pvst


22
Refer to the exhibit. All edge ports are configured with the spanning-tree portfast command. Host1 is recently connected to port Fa0/1 on switch SW1 . Which statement is true about the status of port Fa0/1?
The port will transition into blocking state.
The port will transition immediately into forwarding state.***
The port will transition into blocking state and then immediately into forwarding state. The port will transition into blocking state and immediately transition through the listening and learning states.


23 While monitoring LAN traffic, a network technician notices an excessive number of broadcasts. Which two steps could be included in the processes that are needed to reduce the number of broadcasts on the network? (Choose two.)
Replace any existing hubs with switches. Add a Layer 3 device to route between networks.*** Subnet the existing IP network to create two networks.***
Increase the backbone speed by three times the current speed. Add additional switches and spread out the number of hosts evenly between them.


24 How does a switch that is configured for 802.1Q trunking handle untagged frames that are received on a trunk port?
The frames are dropped.
The frames are assigned to the native VLAN.***
The frames are assigned to the default VLAN. The frames are assigned to the management VLAN.
25
Refer to the exhibit. What would happen if the network administrator moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch SW1?
Host A remains a member of VLAN 10, because the router is routing traffic between VLANs. Host A is no longer a member of VLAN 10, because port Fa0/3 has been manually assigned to VLAN 30.***
Host A remains a member of VLAN 10, because the switch provides dynamic VLAN assignment for the port. Host A maintains connectivity to all members of VLAN 10, because it is connected to the same physical network. Host A is no longer a member of VLAN 10, but because port Fa0/3 was unused, it is now a member of VLAN 1.


26
Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts B and D cannot ping each other. What is the most likely cause of this problem?
The link between the switches is up but not trunked. The Fa0/11 interface of Switch1 is not configured as a trunk.
Hosts B and D are configured with IP addresses from different subnets.***
VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.
27
Refer to the exhibit. A network administrator issues the show interfaces fastEthernet 0/8 switchport command to check the status of the port. What can be concluded from the output? Port Fa0/8 is configured as a trunk with 802.1q encapsulation.
Port Fa0/8 is configured as a trunk in VLAN 1.
Port Fa0/8 is configured in access mode and associated with VLAN 1.***
Port Fa0/8 is configured as a trunk and VLAN 1 is a native VLAN for the trunk.
28
Refer to the exhibit. SW-T has been configured with a single trunking interface. Which VLANs will be allowed across the trunk?
Only VLAN 1 will be allowed across the trunk.
All configured VLANs will be allowed across the trunk.***
Only the native VLAN will be allowed across the trunk.
Only the the management and native VLANs will be allowed across the trunk. Only VLANs that are configured on the VTP server in the domain will be allowed across the trunk.
29
Refer to the exhibit. How will switch S2 manage traffic coming from host PC1?
S2 will drop the traffic, unless it is management traffic.
S2 will tag the frame with VLAN ID 99 when it forwards it over the trunk link.
S2 will leave the traffic untagged when it forwards it over a trunk link.***
S2 will tag the traffic with the highest VLAN ID value when it forwards it over the trunk link.


30 What is the purpose of VLAN trunking?
It improves network performance by reducing broadcast traffic. It selects the best path to transmit data in a switched network.
It carries the traffic of multiple VLANs through a single link.***
It avoids spanning tree loops in a switched network.


31 A network administrator implements inter-VLAN routing by configuring subinterfaces on a router. What is one important fact that must be considered?
The physical interface must have an IP address configured.
The subinterface numbers must match the VLAN ID number.
The no shutdown command must be issued on each subinterface.
The IP address of each router subinterface must be used as the default gateway for hosts on the corresponding VLAN.***


32
Refer to the exhibit. The hosts connected to switch SW1 are not able to communicate with the hosts in the same VLANs connected to switch SW2. What should be done to fix the problem?
Configure VLANs with different VLAN IDs on switch SW2.
Reconfigure the trunk port on switch SW2 with static trunk configuration.***
Introduce a Layer 3 device or a switch with Layer 3 capability in the topology.
Apply IP addresses that are in the same subnet to the interfaces used to connect SW1 and SW2.
33
Refer to the exhibit. Which three options correctly describe the router configuration that is shown? (Choose three.)
An IEEE standard trunking protocol is in use.***
Interface Fa0/1 has been configured with subinterfaces.***
The shutdown command has been applied to interface Fa0/1. Interface Fa0/1.3 is mapped to the default management VLAN.
The configuration is appropriate for a router-on-a-stick network design.***
An IP address should be applied to interface Fa0/1 for routing to occur.
34
Refer to the exhibit. A new host needs to be connected to VLAN 3. Which IP address should be assigned to this new host?
192.168.1.22 /28
192.168.1.31 /28
192.168.1.32 /28
192.168.1.52 /28***
192.168.1.63 /28
35
Refer to the exhibit. A network administrator is configuring RT1 for inter-VLAN routing. The switch is configured correctly and is functional. Host1, Host2, and Host3 cannot communicate with each other. Based on the router configuration, what is causing the problem?
Interface Fa0/0 is missing IP address configuration information.
IP addresses on the subinterfaces are incorrectly matched to the VLANs.***
Each subinterface of Fa0/0 needs separate no shutdown commands.
Routers do not support 892.1Q encapsulation on subinterfaces.
36
Refer to the exhibit. Router R1 is properly configured for router on a stick inter-VLAN routing, but PC1 is unable to ping PC2. What needs to be done to resolve the problem?
Rename VLAN1.
Connect one more port of S1 to R1. Configure the Fa0/1 port of S1 as a trunk port.***
Move the Fa0/0 interface of R1 to another VLAN.
37
Refer to the exhibit. Both switches are interconnected via a trunk link. Host A and host B are on the default VLAN but are not able to exchange traffic. What should be done to fix the problem?


Allow all VLANs on the trunk link.
Remove the native VLAN from the trunk.
Include a router or switch with Layer 3 capabilities.
Configure the same native VLAN on both ends of the trunk.***
38
Refer to the exhibit. A network administrator has segmented the network into two VLANs. The connected hosts can only access resources in their own VLAN. What is the most scalable and cost effective solution to allow inter-VLAN communication in this network?
Replace S1 with a router that has one FastEthernet interface for each PC.
Add a second switch and divide the PCs so that each VLAN is connected to its own switch. Configure a router with two subinterfaces on one of its FastEthernet ports and connect it to S1 using a trunk link.***
Connect a router to a port on S1 and assign the IP address of VLAN1 to the connecting router interface.
39
Refer to the exhibit. This switch is to be added to the production network. Which two facts about VLANs and VTP operation can be confirmed by this output? (Choose two.)
The network administrator will be able to configure VLANs of local significance on this switch. VLANs can only be added to the VLAN database on this switch by a VTP advertisement.***
All VLANs that are configured on this switch will be sent to all other switches in the same VTP domain.
This switch will drop all VTP advertisements that come from switches that are configured in the same VTP domain.
Adding this switch to the network will cause no disruption in the VTP domain operations if the rest of the switches in the same VTP domain have a higher configuration revision number.***
40
Refer to the exhibit. VTP pruning is enabled in the VTP domain that is shown. How will switch ST-1 handle Layer 2 broadcast traffic originating from host A on switch ST-C?
It will be dropped. It will be forwarded out port Fa0/5 only.***
It will be forwarded out ports Fa0/5 and Fa0/10.
It will be forwarded out ports Fa0/5, Fa0/10, and Fa0/15.


41 In which mode is a VTP switch operating if it does not allow for the creation of local VLANs but it does accept VLAN updates from other switches in the same domain?
client***
root
server
transparent


42 The network administrator wants to configure a switch to pass VLAN update information to other switches in the domain but not update its own local VLAN database. Which two steps should the administrator perform to achieve this? (Choose two.)
Reset the VTP counters.***
Configure VTP version 1 on the switch.
Configure the VTP mode of the switch to transparent.
Verify that the switch has a higher configuration revision number.***
Configure the switch with the same VTP domain name as other switches in the network.
43
Refer to the exhibit. Switch SW2 has been newly purchased and added to the network. What configuration should be applied to SW2 so that it participates in the same VTP domain as switch SW1, receives VLAN information from SW1, and synchronizes VLAN information?
Disable VTP pruning on SW2. Configure SW2 in VTP transparent mode.***
Configure SW2 with the VTP domain password.
Configure SW2 as a VTP server with a higher revision number.
44
Refer to the exhibit. Switch SW2 was tested in a lab environment and then inserted into a production network without reloading its configuration. After the trunk link between SW1 and SW2 was brought up, all users lost connectivity to the network. What could be the source of the problem?
All the VLANs were pruned from the trunk port between SW1 and SW2.
SW1 and SW2 cannot be both set as VTP servers in the same VTP domain.
VTP configuration revision number of SW2 was higher than the configuration revision number of SW1.***
The additional VLANs from SW2 created more VLANs than the VLAN database of SW1 could contain.
45
Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both switches with VTP, but S3 is unable to propagate VLANs to S2. What could be the reason for this?
The VTP configuration revision is different on both switches.
The VTP domains are different on both switches.***
VTP pruning is disabled. VTP v2 is disabled.
46 A wireless LAN access point will convert traffic between which two frame encapsulation types?
802.1 and 802.11
802.3 and 802.11***
802.3 and 802.16
802.5 and 802.16
47 Which parameter is used to uniquely identify one wireless network from another?
SSID***
OFDM
WEP
DSSS


48 What provides an authentication mechanism for 802.11-based wireless networks?
DSSS
OFDM
SSID
WPA***


49 Why is MAC address filtering considered a poor choice in securing a WLAN?
Available bandwidth is reduced.
MAC addresses are easily spoofed.***
APs are more susceptible to DoS attacks.
The payload encryption is easily broken.


50
Refer to the exhibit. Users A and B are reporting intermittent connectivity problems. Pre-installation surveys showed strong signal strength from the AP locations to the client locations. Outside electrical interference has been eliminated. What will fix the problem?
Relocate the APs closer to each other.
Increase the distance between the clients.
Change the channel on AP-B to 6 or 11.***
Place AP-A and AP-B on the same wireless channel.  

CCNA 3 exploration - Final Exam (update - 3)

1
Refer to the exhibit. A network administrator needs to add IP phones to the network. To which devices should the IP phones connect?
AS1 and AS2***
DS1 and DS2
DS1, DS2, and CS1
AS1, AS2, DS1, and DS2
2
Which switching method provides error-free data transmission?
fragment-free
fast-forward
integrity-checking
store-and-forward***
3
Refer to the exhibit. All hosts are in listen mode. Host 1 and Host 4 both transmit data at the same time. How do the hosts respond on the network? (Choose two.)
After the end of the jam signal, a backoff algorithm is invoked. ***
Hosts 1 and 4 are operating full duplex so no collision will exist.
The hub will block the port connected to Host 4 to prevent a collision.
Hosts 1 and 4 are assigned shorter backoff values to provide them priority to access the media.
If a host has data to transmit after the backoff period of that host, the host checks to determine if the line is idle before transmitting. ***
4
What information in an Ethernet frame is used by a Layer 2 switch to build its address table?
source IP address
source MAC address***
destination IP address
destination MAC address
5
Which three actions are performed during the boot sequence of a Cisco switch? (Choose three.)
The boot loader uses the self-contained switch operating system to boot the switch.
The boot loader retrieves diagnostics routines via TFTP.
The boot loader performs POST. **
The boot loader is loaded from RAM.
The boot loader initializes the flash file system that is used to boot the system. ***
The boot loader loads the default operating system if the flash-based operating system is corrupt or missing. ***
6
While configuring a new switch, a network administrator configures the switch as an HTTP server. What benefits does this configuration provide?
This allows the switch to host web pages for the network.
This allows remote VPN connections to the switch over the Internet.
This is required if a web server or web farm is attached to the switch.
This allows web-based configuration tools to be used with the switch. ***
7
Company policy requires disabling the command history buffer on network devices. An administrator enters terminal no history size at the command prompt on a Cisco Catalyst switch and receives no error messages back, but the command history buffer is still available. What is the problem?
The command contained a syntax error.
The Cisco IOS version does not support disabling the command history buffer.
The command history can only be disabled on a router, not a switch.
The size parameter reset the default buffer size but did not disable access to the buffer. ***
8
What is the purpose of issuing the command switchport mode access on a switch interface?
disable port security
make the port operational
override the default port behavior
force the port to be a part of a single vlan ***


9
What is a possible impact of setting too short an aging time in the MAC address table of a switch?
overly large address table
unnecessary flooding of packets ***
excessive timeouts of static addresses
impaired ability to dynamically learn new addresses


10
Refer to the exhibit. What does STATIC indicate in the output that is shown?
Switch port Fa0/24 can only work in VLAN 99.
VLAN 99 was manually added to the VLAN database.
MAC address 0001.637b.b267 was learned from the source address of a frame that was received on switch port Fa0/24.
MAC address 0001.637b.b267 was manually associated with the switch port Fa0/24. /****
11
Refer to the exhibit. What will be the result of the commands that are shown in the exhibit?
Only clients on VLAN 2 will be able to use DHCP for addressing.
DHCP server responses will only be permitted on interface Fa0/2.***
Only 100 clients are permitted to request DHCP addresses on VLAN 2.
Client requests for DHCP addresses will be filtered out if the requests are not received on interface Fa0/2.
12
Why is it advisable that a network administrator use SSH instead of Telnet when managing switches?
SSH uses TCP whereas Telnet does not.
SSH encrypts only the username and password when logging in.
SSH encrypts all remote management communications whereas Telnet does not. ***
SSH sends a clear text message steam which reduces the bandwidth use for management.
13
Which service should be disabled on a Cisco switch or router to prevent packet sniffers from capturing information about the device?
SSH
VTP
CDP ***
SNMP
14
Refer to the exhibit. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol. All inter-switch links that are shown are trunks. Whenever an inter-switch link fails, the network takes nearly a minute to completely converge. How can the convergence time be reduced?
Increase the capacity of the distribution and core trunk links to 10 Gb/s.
Add a trunk link that directly connects D1 and D2.
Use Layer 3 switching on the core switch.
Implement Rapid Spanning Tree Protocol. ***
15
Which statement is correct about STP architecture?
Spanning Tree Protocol will guarantee a loop free Layer 2 topology. ***
Spanning Tree Protocol guarantees the shortest path to destination networks.
The switch with the highest priority will be assigned the lowest BID in the root election.
The first step in the spanning-tree election process is to determine the root port.
To select designated ports, the spanning-tree algorithm must determine the longest contiguous path from the root bridge.
16
What identifier in the BPDU creates a unique BID for a switch?
IP address
MAC address ***
bridge priority
VLAN ID
port priority
17
Refer to the exhibit. Each switch is shown with its MAC address. Which switch will be elected as the spanning-tree root bridge if the switches are configured with their default priority values?
switch A
switch B
switch C
switch D
switch E
switch F ***
18
Which device or devices should have the Spanning Tree Protocol enabled to prevent host traffic from creating a broadcast storm?
Core_S1
Access_S2 and Access_S3
Core_S1, Access_S2, and Access_S3 ***
Core_S1, Access_S2, Access_S3, and R1
19
Refer to the exhibit. What are two reasons for the Fa0/24 port being placed in the blocking state? (Choose two.)
This switch is not the root bridge.***
The Fa0/24 port is administratively down.
STP has detected links that create a loop.***
There is a change in the VTP configuration.
The Fa0/24 port is overloaded with too much traffic for its configured bandwidth.
20
Which STP port type can only appear once on a segment, and must be present in order for traffic to flow on that segment?
non-root port
disabled port
designated port ***
non-designated port


21
Refer to the exhibit. Which Spanning Tree Protocol version is in effect?
Per VLAN Spanning Tree (PVST)
Per VLAN Spanning Tree + (PVST+)
Common Spanning Tree (CST)
Rapid Spanning Tree Protocol (RSTP) ***
Multiple Spanning Tree Protocol (MSTP)
22
Refer to the exhibit. All edge ports are configured with the spanning-tree portfast command. Host1 is recently connected to port Fa0/1 on switch SW1 . Which statement is true about the status of port Fa0/1?
The port will transition into blocking state.
The port will transition immediately into forwarding state. ***
The port will transition into blocking state and then immediately into forwarding state.
The port will transition into blocking state and immediately transition through the listening and learning states.
23
Refer to the exhibit. What is the maximum number of VLANs that can be deleted from the Switch as it is configured?
zero
four ***
five
eight
nine
24
What are two characteristics of normal range VLANs? (Choose two.)
not learned by VTP
stored in vlan.dat file ***
designed for service providers
can contain ports used as trunks
identified by a VLAN ID between 1 and 1005 ***
25
How are data frames identified and sent to the correct VLAN when exiting an Ethernet trunk?
Frames are forwarded to the correct VLAN based on the VLAN tag***
Frames are always forwarded to the native VLAN when exiting a trunk.
Frames are forwarded to the correct VLAN based on the source IP address.
Frames are forwarded to the correct VLAN based on information in the MAC address table.
26
Refer to the exhibit. What is the purpose of the configuration commands that are shown?
to activate port Fa0/10
to make the port a member of VLAN 30 ***
to activate port security on port Fa0/10
to add VLAN 30 to the trunk that is connected to port Fa0/10
27
How does a switch that is configured for 802.1Q trunking handle untagged frames that are received on a trunk port?
The frames are dropped.
The frames are assigned to the native VLAN. ***
The frames are assigned to the default VLAN.
The frames are assigned to the management VLAN.
28
Refer to the exhibit. R1 is configured for traditional inter-VLAN routing. R1 can ping computer 3 but cannot ping computer 1. What is a possible cause for this failure?
S1 port Fa0/11 is in the wrong VLAN. ***
R1 does not have an active routing protocol.
The IP address of computer 1 is in the wrong logical network.
Router interface Fa0/0 has the wrong trunk encapsulation type configured.
29
Refer to the exhibit. What will allow a host on VLAN 40 on switch X to communicate with a host in VLAN 40 on switch Y?
QoS
routing
trunking ***
VPN
30
Refer to the exhibit. What is true of the configuration of switch S1?
Only VLAN 99 will be allowed to use the trunk links.
Switch ports Fa0/1 and Fa0/3 are configured with a standard trunking protocol. ***
Switch ports Fa0/1 and Fa0/3 should be configured as access ports to allow data from multiple VLANs to access switch S1.
The switch negotiated trunk links for interfaces Fa0/1 and Fa0/3 because all connected interfaces have been configured with the switchport mode dynamic auto command.
31
Refer to the exhibit. Which two statements are true about the operation of the interfaces? (Choose two.)
Incoming traffic with VLAN ID 0 is processed by interface fa0/0.
Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.***
Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is down.
Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to the hardware address.
Traffic inbound on this router is processed by different subinterfaces, depending on the VLAN from which the traffic originated.***
32
A network administrator is asked to connect four switches that are each configured with eight VLANs. Routers that have two FastEthernet ports each that support trunking are available. What is the minimum number of routers needed to interconnect traffic from all of the VLANs if trunking is allowed?
1 ***
2
4
8
16
33
Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.85. What will the router do with this packet?
The router will ignore the packet. ***
The router will forward the packet out interface FastEthernet 0/1.2 and interface FastEthernet 0/1.3.
The router will forward the packet out interface FastEthernet 0/1.1.
The router will forward the packet out interface FastEthernet 0/1.2.
The router will forward the packet out interface FastEthernet 0/1.3.
34
What are two requirements for configuring inter-VLAN routing using the router-on-a-stick model? (Choose two.)
Each subinterface should be configured with its own IP address, subnet mask, and unique VLAN assignment. ***
The physical interface of the router must be connected to a trunk link on the adjacent switch.***
The number of physical interfaces on the router should match the number of VLANs.
Different static VLANs should be assigned to different interfaces of the router.
The router should be configured as the VTP server.
35
Refer to the exhibit. Both switches are interconnected via a trunk link. Host A and host B are on the default VLAN but are not able to exchange traffic. What should be done to fix the problem?
Allow all VLANs on the trunk link.
Remove the native VLAN from the trunk.
Include a router or switch with Layer 3 capabilities.
Configure the same native VLAN on both ends of the trunk.***
36
Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts A and D cannot ping each other. What is the most likely cause of this problem?
The link between the switches is up but not trunked.
The Fa0/11 interface of Switch1 is not configured as a trunk. ***
Hosts A and D are configured with IP addresses from different subnets.
VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.
37
Refer to the exhibit. A network administrator has segmented the network into two VLANs. The connected hosts can only access resources in their own VLAN. What is the most scalable and cost effective solution to allow inter-VLAN communication in this network?
Replace S1 with a router that has one FastEthernet interface for each PC.
Add a second switch and divide the PCs so that each VLAN is connected to its own switch.
Configure a router with two subinterfaces on one of its FastEthernet ports and connect it to S1 using a trunk link. ***
Connect a router to a port on S1 and assign the IP address of VLAN1 to the connecting router interface.
38
Refer to the exhibit. After the listed commands are entered into router R1 and switch S1, the administrator enters the show interface fa0/1 trunk and gets the results shown. What is the likely problem?
The trunk is established, but no VLANs have been configured to use it.
The router is missing the dynamic trunking protocol statements necessary to form a trunk.
The trunk has not been established because the router does not support dynamic trunking protocol.***
The router, the switch, or both must be configured with the dynamic desirable option for dynamic trunking protocol to establish a trunk.
39
Refer to the exhibit. The network administrator has just added VLAN 50 to Switch1 and Switch2. Hosts A, B, C, and D are correctly configured with IP addresses in the subnet range for VLAN 50. Host A can communicate with host B, but cannot communicate with host C or host D. What is the cause of this problem?
There is a native VLAN mismatch.
The Fa0/11 interface of Switch1 is not configured as a trunk.
The link between Switch1 and Switch2 is up but not trunked.
VLAN 50 is not allowed on the trunk link between Switch1 and Switch2. ***
40
Which configuration changes will increment the configuration revision number on the VTP server?
configuring trunk links on the VTP server
configuring or changing the VTP password
configuring or changing the VTP domain name
configuring or changing the VTP version number
configuring or deleting a VLAN or creating a VLAN name ***
41
What is the purpose of VTP pruning?
to restrict traffic on specified trunk lines ***
to designate switches that do not participate in VTP
to advertise VTP domain information to specified switches only
to reduce the propagation of VTP advertisements in the switched network


42
A new switch is to be added to an existing network in a remote office. The network administrator does not want the technicians in the remote office to be able to add new VLANs to the switch, but the switch should receive VLAN updates from the VTP domain. Which two steps must be performed to configure VTP on the new switch to meet these conditions? (Choose two.)
Configure an IP address on the new switch.
Configure the existing VTP domain name on the new switch.***
Configure all ports of both switches to access mode.
Configure the new switch as a VTP client. ***
Enable VTP pruning.
43
Refer to the exhibit. Switch SW2 was tested in a lab environment and then inserted into a production network without reloading its configuration. After the trunk link between SW1 and SW2 was brought up, all users lost connectivity to the network. What could be the source of the problem?
All the VLANs were pruned from the trunk port between SW1 and SW2.
SW1 and SW2 cannot be both set as VTP servers in the same VTP domain.
VTP configuration revision number of SW2 was higher than the configuration revision number of SW1.***
The additional VLANs from SW2 created more VLANs than the VLAN database of SW1 could contain.


44
Refer to the exhibit. The network administrator is planning five additional VLANs to be shared throughout the VTP domain on S3. What action should the administrator take before creating the additional VLANs?
Create the VLANs on a switch in VTP server mode and allow them to propogate to the other switches in the domain. ***
Modify the configuration revision to 10 to support the additional VLANs.
Enable the VTP pruning mode in order to create the VLANs on S3.
Enable the VTP v2 mode.
45
Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both switches with VTP, but S3 is unable to propagate VLANs to S2. What could be the reason for this?
The VTP configuration revision is different on both switches.
The VTP domains are different on both switches.***
VTP pruning is disabled.
VTP v2 is disabled.
46
A wireless LAN access point will convert traffic between which two frame encapsulation types?
802.1 and 802.11
802.3 and 802.11 ***
802.3 and 802.16
802.5 and 802.16
47
Which parameter is used to uniquely identify one wireless network from another?
SSID ***
OFDM
WEP
DSSS
48
A wireless client is attempting to establish a connection with a wireless access point. What process does the client use to discover the access points which are available to it?
probing ***
beaconing
association
authentication
49
Why is MAC address filtering considered a poor choice in securing a WLAN?
Available bandwidth is reduced.
MAC addresses are easily spoofed. ***
APs are more susceptible to DoS attacks.
The payload encryption is easily broken.
50
Which combination is required to establish a connection to initially configure the Linksys WRT300N wireless access device?
a computer with a console connection to the WRT300N
a computer with a wireless connection to the WRT300N
a computer with an AUX port connection to the WRT300N
a computer configured in the same IP subnet as the WRT300N and a direct cable connection to it ***