CCNA 2 – Chapter 3 – Exam Answer 2016 100%

CCNA 2 – Chapter 3 – VLANs Exam Answer 2016 100% – CCNA v5.2

1. Which three statements accurately describe VLAN types? (Choose three).

• A data VLAN is used to carry VLAN management data and user-generated traffic.
• An 802.1Q trunk port, with a native VLAN assigned, supports both tagged and untagged traffic.
• Voice VLANs are used to support user phone and e-mail traffic on a network.
• VLAN 1 is always used as the management VLAN.
• A management VLAN is any VLAN that is configured to access management features of the switch.
• After the initial boot of an unconfigured switch, all ports are members of the default VLAN.

2. Which two statements are true about VLAN implementation? (Choose two.)

• The number of required switches in a network decreases.
• The network load increases significantly because of added trunking information.
• Devices in one VLAN do not hear the broadcasts from devices in another VLAN.
• The size of the collision domain is reduced.
• VLANs logically group hosts, regardless of physical location.

3. A network administrator is determining the best placement of VLAN trunk links. Which two types of point-to-point connections utilize VLAN trunking? (Choose two.)

• between a switch and a client PC
• between a switch and a network printer
• between two switches that share a common VLAN
• between two switches that utilize multiple VLANs
• between a switch and a server that has an 802.1Q NIC

4. What is the effect of issuing a switchport access vlan 20 command on the Fa0/18 port of a switch that does not have this VLAN in the VLAN database?

• VLAN 20 will be created automatically.
• Port Fa0/18 will be shut down.
• The command will have no effect on the switch.
• An error stating that VLAN 20 does not exist will be displayed and VLAN 20 is not created.

5. Port Fa0/11 on a switch is assigned to VLAN 30. If the command no switchport access vlan 30 is entered on the Fa0/11 interface, what will happen?

• An error message would be displayed.
• VLAN 30 will be deleted.
• Port Fa0/11 will be shutdown.
• Port Fa0/11 will be returned to VLAN 1.

6.

CCNA 2 – Chapter 3 – VLANs Exam Answer 2016 100% – CCNA v5.2

Refer to the exhibit. PC-A and PC-B are both in VLAN 60. PC-A is unable to communicate with PC-B. What is the problem?

• The native VLAN is being pruned from the link.
• The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk.
• The native VLAN should be VLAN 60.
• The trunk has been configured with the switchport nonegotiate command.

7. Which command is used to remove only VLAN 20 from a switch?

• delete flash:vlan.dat
• no switchport access vlan 20
• delete vlan.dat
• no vlan 20

8. Which command displays the encapsulation type, the voice VLAN ID, and the access mode VLAN for the Fa0/1 interface?

• show interfaces Fa0/1 switchport
• show interfaces trunk
• show vlan brief
• show mac address-table interface Fa0/1

9.

CCNA 2 – Chapter 3 – VLANs Exam Answer 2016 100% – CCNA v5.2

Refer to the exhibit. A frame is traveling between PC-A and PC-B through the switch. Which statement is true concerning VLAN tagging of the frame?

• A VLAN tag is added when the frame is accepted by the switch.
• No VLAN tag is added to the frame.
• A VLAN tag is added when the frame leaves PC-A.
• A VLAN tag is added when the frame is forwarded out the port to PC-B.

10. A Cisco Catalyst switch has been added to support the use of multiple VLANs as part of an enterprise network. The network technician finds it necessary to clear all VLAN information from the switch in order to incorporate a new network design. What should the technician do to accomplish this task?

• Erase the running configuration and reboot the switch.
• Delete the IP address that is assigned to the management VLAN and reboot the switch.
• Erase the startup configuration and reboot the switch.
• Delete the startup configuration and the vlan.dat file in the flash memory of the switch and reboot the switch.

11. A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?

• It allows VLANs 1 to 30 on Fa0/5.
• It allows VLANs 10, 20, and 30 on Fa0/5.
• It allows only VLAN 30 on Fa0/5.
• It allows a native VLAN of 30 to be implemented on Fa0/5.

12. What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?

• Only VLAN 1 will be allowed across the trunk.
• The switches will negotiate via VTP which VLANs to allow across the trunk.
• All VLANs will be allowed across the trunk.
• Only the native VLAN will be allowed across the trunk.

13. In a basic VLAN hopping attack, which switch feature do attackers take advantage of?

• automatic encapsulation negotiation
• the default automatic trunking configuration
• an open Telnet connection
• forwarding of broadcasts

14. What must the network administrator do to remove Fast Ethernet port fa0/1 from VLAN 2 and assign it to VLAN 3?

• Enter the switchport access vlan 3 command in interface configuration mode.
• Enter the no shutdown in interface configuration mode to return it to the default configuration and then configure the port for VLAN 3.
• Enter the no vlan 2 and the vlan 3 commands in global configuration mode.
• Enter the switchport trunk native vlan 3 command in interface configuration mode.

15. Which command should the network administrator implement to prevent the transfer of DTP frames between a Cisco switch and a non-Cisco switch?

• S1(config-if)# switchport nonegotiate
• S1(config-if)# switchport mode access
• S1(config-if)# switchport trunk allowed vlan none
• S1(config-if)# switchport mode trunk
• S1(config-if)# switchport mode dynamic desirable

16. Under which two occasions should an administrator disable DTP while managing a local area network? (Choose two.)

• when a neighbor switch uses a DTP mode of dynamic auto
• on links that should not be trunking
• on links that should dynamically attempt trunking
• when connecting a Cisco switch to a non-Cisco switch
• when a neighbor switch uses a DTP mode of dynamic desirable

17. What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch?

• The port goes back to the default VLAN.
• The port creates the VLAN again.
• The port becomes inactive.
• The port automatically associates itself with the native VLAN.

18. Match the DTP mode with its function. (Not all options are used.)

Match the DTP mode with its function. (Not all options are used.)

19.

CCNA 2 – Chapter 3 – VLANs Exam Answer 2016 100% – CCNA v5.2

Refer to the exhibit. DLS1 is connected to another switch, DLS2, via a trunk link. A host that is connected to DLS1 is not able to communicate to a host that is connected to DLS2, even though they are both in VLAN 99. Which command should be added to Fa0/1 on DLS1 to correct the problem?

• switchport mode dynamic auto
• switchport trunk allowed vlan add 99
• switchport nonegotiate
• switchport trunk native vlan 66

20. Which switch feature ensures that no unicast, multicast, or broadcast traffic is passed between ports that are configured with this feature?

• PVLAN protected port
• switch port security
• VLAN
• ACL

21. Fill in the blank
Use the full command syntax.
The    show vlan    command displays the VLAN assignment for all ports as well as the existing VLANs on the switch.

22. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Which PCs will receive the broadcast sent by PC-C?

• PC-D, PC-E
• PC-A, PC-B, PC-D, PC-E
• PC-A, PC-B, PC-D, PC-E, PC-F
• PC-A, PC-B
• PC-A, PC-B, PC-E

23. Which two Layer 2 security best practices would help prevent VLAN hopping attacks? (Choose two.)

• Change the management VLAN to a distinct VLAN that is not accessible by regular users.
• Disable DTP autonegotiation on end-user ports.
• Use SSH for all remote management access.
• Change the native VLAN number to one that is distinct from all user VLANs and is not VLAN 1.
• Statically configure all ports that connect to end-user host devices to be in trunk mode.

24.

CCNA 2 – Chapter 3 – VLANs Exam Answer 2016 100% – CCNA v5.2

Refer to the exhibit. Interface Fa0/1 is connected to a PC. Fa0/2 is a trunk link to another switch. All other ports are unused. Which security best practice did the administrator forget to configure?

• Change the native VLAN to a fixed VLAN that is distinct from all user VLANs and to a VLAN number that is not VLAN 1.
• All user ports are associated with VLANs distinct from VLAN 1 and distinct from the ‘black-hole’ VLAN.
• Disable autonegotiation and set ports to either static access or static trunk.
• Configure all unused ports to a ‘black-hole’ VLAN that is not used for anything on the network.