Day 31

1. STP port states include (choose all that apply).

Forwarding

Blocking

Listening

Learning

Disabled

Question 1 of 29

2. When configured at interface level BPDU Filter effectively disables STP on the selected ports by preventing them from sending or receiving any BPDUs.

False

True

Question 2 of 29

3. The Root Guard feature prevents a Root Port from becoming a Designated Port.

False

True

Question 3 of 29

4. The BPDU Guard feature prevents the port from receiving any BPDUs but does not prevent it from sending them. If any BPDUs are received, the port will be errdisabled.

False

True

Question 4 of 29

5. The Uplink Fast feature provides faster failover to a redundant link when the indirect link fails.

False

True

Question 5 of 29

6. Switches determine the best Configuration BPDU based on the following four factors which order?:

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

1234

4321

1324

2134

Question 6 of 29

7. Port Fast is a feature that is typically enabled only for a port or interface that connects to a switch.

True

False

Question 7 of 29

8. STP uses the exchange of BPDUs to determine the network topology, which is determined by the following three variables:

The port identifier (MAC address of the port) associated with each switch port

The ARP cache entry for the connected switch

The path cost to the Root Bridge associated with each switch port

The unique MAC address (switch identifier) that is associated with each switch

Question 8 of 29

9. The default port cost for Fast Ethernet is?

250

Question 9 of 29

10. The STP Bridge Priority values range from 0 to _____.

1024

128

65535

Question 10 of 29

11. The Port Fast feature does effectively disables Spanning Tree on the selected port.

True

False

Question 11 of 29

12. Per VLAN Spanning Tree Plus (PVST+) allows for an individual STP instance per VLAN.

True

False

Question 12 of 29

13. In the spanning tree listening state the switch discards frames received on the port from the attached segment.

False

True

Question 13 of 29

14. In the spanning tree learning state the switch discards frames received from the attached segment.

False

True

Question 14 of 29

15. The STP Max Age timer is?

2 seconds

5 seconds

20 seconds

15 seconds

Question 15 of 29

16. RSTP uses the same BPDU as STP.

False

True

Question 16 of 29

17. STP port Listening state can be mapped to RSTP ____ state.

Learning

Listening

Discarding

Forwarding

Question 17 of 29

18. What type of port is obscured in the below fig?

Alternate Port

Secondary Port

Root Port

Backup Port

Question 18 of 29

19. RSTP port roles include (choose all that apply)

Backup

Designated

Alternate

Root

Question 19 of 29

20. RSTP is backwards compatible with STP.

False

True

Question 20 of 29

21. RSTP performs similar functions to Uplink Fast and Backbone Fast.

True

False

Question 21 of 29

22. All your switches are left at default settings. Which of the below commands will set your switch to be the STP root?

Switch(config)#spanning-tree vlan 2 root primary

Switch(config)#spanning-tree vlan 2 root active

Switch(config)#spanning-tree vlan 2 root 4096

Switch(config)#spanning-tree vlan 2 root

Question 22 of 29

23. Which bridge is elected root?

Question 23 of 29

24. STP is defined in ____?

RFC 802.1D

IEEE 802.1D

Cisco propreitary (not defined)

ANSI 802.1D

Question 24 of 29

25. All your switches are left at default settings. Which of the below commands will set your switch to be the STP root?

Switch(config)#spanning-tree vlan 2 priority 32768

Switch(config)#spanning-tree vlan 2 priority primary

Switch(config)#spanning-tree vlan 2 priority 4096

Switch(config)#spanning-tree vlan 2 priority 65535

Question 25 of 29

26. BPDU Guard should be enabled on all ports with Port Fast enabled.

True

False

Question 26 of 29

27. Which port is marked in the below diagram?

Alternate Port

Secondary Port

Backup Port

Redundant Port

Question 27 of 29

28. In the spanning tree forwarding state the switch _____ frames received from the attached segment.

buffers

discards

forwards

blocks

Question 28 of 29

29. BPDUs are sent every ___ seconds.

Question 29 of 29

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