Day 34

1. By default, PAgP packets are sent between EtherChannel-capable ports in order to negotiate the forming of an EtherChannel. These packets are sent to the destination Multicast MAC address ________, which is also the same Multicast address that is used by CDP, UDLD, VTP, and DTP.

01-00-0C-CC-CC-CC

01-CC-0C-CC-CC-CC

00-00-0C-CC-CC-CC

01-0A-0C-CC-CC-CC

Question 1 of 18

2. Switch EtherChannels using PAgP may be configured to operate in one of two modes: ___ or _____.

passive or active

primary or secondary

master or slave

auto or desirable

Question 2 of 18

3. If you want to configure Extended VLANs, you must put the switch into VTP server mode.

True

False

Question 3 of 18

4. The default bridge priority for Cisco switches is?

16384

32768

255

Question 4 of 18

5. STP timers for Hello - Forward Delay - Max Age are?

15-20-2

20-15-2

2-15-20

Question 5 of 18

6. During STP root bridge election, traffic is still forwarded over switches in the STP domain.

True

False

Question 6 of 18

7. LACP supports which two modes?

master and slave

primary and secondary

active and passive

auto and desirable

Question 7 of 18

8. Switches determine the best Configuration BPDU based on the following four factors. Sort the list into the correct order.

Lowest sender Port ID
Lowest Root Bridge ID
Lowest sender Bridge ID
Lowest Root path cost to Root Bridge

Question 8 of 18

9. When a Non-Root Bridge receives a Configuration BPDU on its Root Port, which is the port that provides the best path to the Root Bridge, it sends an updated version of the BPDU via its Root Port(s).

True

False

Question 9 of 18

10. Default STP port cost for a 100Mbps interface is?

255

100

Question 10 of 18

11. If authenticated, the port will transition to “_______” and the supplicant will be able to forward packets to the network.

secured

authorized

admitted

authenticated

Question 11 of 18

12. The primary purpose of the Designated Port is to?

Prevent loops

Improve convergence

Increase throughput

Improve security

Question 12 of 18

13. In the event of a tie for STP root port election, what is the order used for tiebreakers?

1. Lowest Root Bridge ID

2. Lowest Root path cost to Root Bridge

3. Lowest sender Bridge ID

4. Lowest sender Port ID

4321

2341

1324

1234

Question 13 of 18

14. Explain Root Guard.

Prevents a port from becoming a designated port.

Prevents a port from becoming a blcking port.

Prevents a port from becoming a forwarding port.

Prevents a port from becoming a root port.

Question 14 of 18

15. Extended VLANs are numbered from ___ to ____, inclusive.

1006 to 4094

1000 to 4099

1001 to 4094

1006 to 4095

Question 15 of 18

16. _______ BPDUs are sent by LAN switches and are used to communicate and compute the Spanning Tree topology.

Topology

Update

Exchange

Configuration

Question 16 of 18

17. Port Fast disables Spanning Tree on the port it is configured on.

False

True

Question 17 of 18

18. To debug STP traffic use the command?

debug spanning tree

debug spanning-tree events

debug stp

debug layer 2

Question 18 of 18

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