Cisco Systems manual Answer E, What is the most common Layer 2 device?

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Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 101-102.

Q. 109

Which line from a show spantree 1 command output indicates that virtual LAN1 (VLAN1) is functioning properly?

A.Root port is fast Ethernet 0/26

B.Port Ethernet 0/1 of VLAN is forwarding

C.Designated port is Ethernet 0/1, path cost 10

D.Designated root has priority 0 address 00D0.588F.B600

E.VLAN is executing the IEEE compatible spanning tree protocol.

Answer: E

Explanation: To determine if the VLAN is functioning properly on will need to examine the first line of the output. That is, VLAN is executing the IEEE compatible spanning tree protocol.

Incorrect Answers:

A is incorrect; this line indicates what the switch thinks is the root port.

B is incorrect; this line indicates which port is forwarding.

C is incorrect; this line indicates the designated port and its associated cost.

D is incorrect; this line indicated the MAC address of the designated root.

Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 199-200.

Q. 110

What is the most common Layer 2 device?

A.Hub

B.Router

C.Switch

D.Repeater

Answer: C

Explanation: Switches and Bridges run on Layer 2.

Incorrect Answers:

A and D are incorrect; they are Layer 1 – Physical Layer devices

B is incorrect; routers are layer 3 device.

Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 14-24.

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