Spanning Tree Protocol

11. Which of the following is a layer 2 protocol used to maintain a loop-free network?

A. VTP
B. STP
C. RIP
D. CDP

Correct Answer: B. STP

12. You need to allow one host to be permitted to attach dynamically to each switch interface. Which two commands must you configure on your catalyst switch to meet this policy?

1. Switch(config-if)# ip access-group 10
2. Switch(config-if)# switchport port-security maximum 1
3. Switch(config)# access-list 10 permit ip host 1
4. Switch(config-if)# switchport port-security violation shutdown
5. Switch(config)# mac-address-table secure

A. 1 and 3
B. 2 and 4
C. 2, 3 and 5
D. 4 and 5

Correct Answer: B. 2 and 4

13. What command will display the forward/filter table?

A. show mac filter
B. show run
C. show mac address-table
D. show mac filter-table

Correct Answer: C. show mac address-table

14. If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

A. Discard it and send an error message back to the originating host
B. Flood the network with the frame
C. Add the source address and port to the MAC address table and forward the frame out the destination port
D. Add the destination to the MAC address table and then forward the frame

Correct Answer: C. Add the source address and port to the MAC address table and forward the frame out the destination port

15. What is the result of segmenting a network with a bridge (switch)?

1. It increases the number of collision domains.
2. It decreases the number of collision domains.
3. It increases the number of broadcast domains.
4. It decreases the number of broadcast domains.
5. It makes smaller collision domains.
6. It makes larger collision domains.

A. 1 and 5
B. 2, 3 and 5
C. 3, 4 and 6
D. 1, 3 and 6

Correct Answer: A. 1 and 5

16. What are the distinct functions of layer 2 switching that increase available bandwidth on the network?

1. Address learning
2. Routing
3. Forwarding and filtering
4. Creating network loops
5. Loop avoidance
6. IP addressing

A. 1, 3 and 5
B. 2, 4 and 6
C. 2 and 6
D. 3 and 5

Correct Answer: A. 1, 3 and 5

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