Day 34

1. 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

1234

2341

1324

Question 1 of 18

2. 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-CC-0C-CC-CC-CC

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

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

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

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?

32768

16384

255

Question 4 of 18

5. LACP supports which two modes?

master and slave

primary and secondary

auto and desirable

active and passive

Question 5 of 18

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

False

True

Question 6 of 18

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

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

Question 7 of 18

8. 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 8 of 18

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

True

False

Question 9 of 18

10. To debug STP traffic use the command?

debug spanning tree

debug spanning-tree events

debug stp

debug layer 2

Question 10 of 18

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

Prevent loops

Improve security

Improve convergence

Increase throughput

Question 11 of 18

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

admitted

secured

authorized

authenticated

Question 12 of 18

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

255

100

Question 13 of 18

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

Topology

Update

Exchange

Configuration

Question 14 of 18

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

1000 to 4099

1001 to 4094

1006 to 4094

1006 to 4095

Question 15 of 18

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

passive or active

auto or desirable

master or slave

primary or secondary

Question 16 of 18

17. 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 root port.

Prevents a port from becoming a forwarding port.

Question 17 of 18

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

2-15-20

20-15-2

15-20-2

Question 18 of 18

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