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Exam Prep Questions

Question 1

Which of the following is true of using VLANs?

  1. Makes it harder to add, move, and change users

  2. Degrades network security

  3. Isolates networking problems

  4. Allows only a single path in a network from one area to another

Answer C is correct. Using VLANs allows for the isolation of problems within a small part of your intranet. VLANs make it easier to add, move, and change users, making answer A incorrect. Answer B is incorrect because VLANs enable you to group users together based on function, which increases your security. Answer D is incorrect because VLANs also enable you to create multiple parallel paths and load-balance across them.

Question 2

You have users who continually move around in your network and you're very concerned about security. What type of VLAN should you implement?

  1. Local

  2. Static

  3. Dynamic

  4. End-to-end

Answers C and D are correct. If you have users who are continually moving around your network, dynamic VLANs are the best choice. In addition, if you're concerned about security, you should implement end-to-end VLANs. Local VLANs are typically used to control broadcasts, not security, making answer A incorrect. Answer B is incorrect because static VLANs should be used if users don't move around a lot.

Question 3

What command takes you into this configuration mode: Switch(vlan)#?

  1. vlan

  2. vtp

  3. vlan database

  4. vtp database

Answer C is correct. To enter the vlan database from Privilege EXEC mode, use the vlan database command. Answer A is incorrect because it creates a VLAN. Answer B is incorrect because it configures VTP parameters. Answer D is incorrect because it is a nonexistent command.

Question 4

ISL adds a ______-byte header and a ______-byte trailer, whereas 802.1Q inserts a ______-byte tag.

  1. 26, 4, 4

  2. 4, 26, 4

  3. 4, 4, 4

  4. 26, 4, 8

Answer A is correct. ISL adds a 26-byte header and a 4-byte trailer to a user's frame to encapsulate it. 802.1Q inserts a 4-byte field into the Ethernet frame, which tags it. Answer B is incorrect because it mixed up the header and trailer sizes for ISL. Answer C is incorrect because it has an incorrect header size for ISL. Answer D is incorrect because it has an incorrect tag size for 802.1Q.

Question 5

Which switch command specifies the DTP mode for trunking?

  1. switchport trunk

  2. switchport mode

  3. switchport native

  4. switchport vtp

Answer B is correct. Answer A is incorrect because this command specifies the trunking encapsulation: ISL or 802.1Q. Answers C and D are incorrect because they are nonexistent commands.

Question 6

You're experiencing problems on trunk interface fa1/1. What command would you use to examine the trunking status?

  1. show interface fa1/1 switchport

  2. show trunk fa1/1

  3. show trunk A

  4. show interface fa1/1

Answer A is correct. Use the show interface fa1/1 switchport command to troubleshoot trunking problems. Answers B and C are incorrect because these are nonexistent commands. Answer D displays only interface status information, not trunking information.

Question 7

Which DTP mode should you use if you're connecting a Cisco switch to a Nortel switch and want to form a trunk?

  1. ISL

  2. 802.1Q

  3. Trunk

  4. Nonegotiate

Answer D is correct. If you are connecting a non-Cisco switch to a Cisco switch, use the nonegotiate DTP mode to form a trunk. Answers A and B are incorrect because these are trunk types, not DTP modes. Answer C is incorrect because this is used between switches that understand DTP (Cisco switches).

Question 8

Which VTP mode processes VTP messages and saves VLAN information in NVRAM?

  1. Client

  2. Server

  3. Transparent

  4. Client and Server

Answer B is correct. In server mode, a server switch can process messages and save its VLAN information to NVRAM. Answers A and D are incorrect because a client switch cannot save its configuration to NVRAM. Answer C is incorrect because a transparent switch doesn't process VTP messages, but it forwards them out other trunk interfaces.

Question 9

You need to set up VTP on a switch. The management domain name is dealgroup and the switch should be in client mode. Enter the configuration to perform this: _________.

Enter the following commands from within either the vlan database or Configuration mode:

vtp domain dealgroup
vtp client

Question 10

You suspect that VTP information is not being passed between two server switches. Which of the following commands would not be helpful in troubleshooting this problem?

  1. show interfaces type slot_#/port_# switchport

  2. show vtp status

  3. show interfaces type slot_#/port# trunk

  4. show vlan

Answer D is correct. The show vlan command doesn't display information about the status of trunks or VTP. Answers A and C are helpful, but incorrect because they show the status of trunking. Answer B is helpful, but incorrect because this command shows your VTP configuration, including the domain name, VTP mode, and VTP password configuration.

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