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多选题Which of the following are spanning tree port states?（）ALearningBSpanningCListeningDForwardingEInitializingFFilteringGPermitting

题目
多选题
Which of the following are spanning tree port states?（）
A

Learning

B

Spanning

C

Listening

D

Forwarding

E

Initializing

F

Filtering

G

Permitting

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相似问题和答案

第1题：

Which of the following are spanning tree port states?()

A. Learning

B. Spanning

C. Listening

D. Forwarding

E. Initializing

F. Filtering

G. Permitting


参考答案：A, C, D

第2题：

Which command enables RSTP on aswitch?()

A.spanning-tree mode rapid-pvst

B.spanning-tree uplinkfast

C.spanning-tree backbonefast

D.spanning-tree mode mst


参考答案：A

第3题：

In the following statements about graph operations，which one is NOT correct?

A．Finding critical path is an operation on directed graph

B．Finding critical path is an operation on undirected graph

C．Spanning tree of a graph may not be unique

D．Minimum spanning tree of a graph may not be unique


正确答案：B

第4题：

A port in a redundant topology is currently in the blocking state and is not receiving BPDUs. To ensure that this port does not erroneously transition to the forwarding state，  which command should be configured to satisfy the requirement？（）

  • A、Switch（config）#spanning-tree loopguard default
  • B、Switch（config-if）#spanning-tree bdpufilter
  • C、Switch（config）#udld aggressive
  • D、Switch（config-if）#spanning-tree bpduguard

正确答案:A

第5题：

Which of the following are spanning tree port states?（）

  • A、Learning
  • B、Spanning
  • C、Listening
  • D、Forwarding
  • E、Initializing
  • F、Filtering
  • G、Permitting

正确答案:A,C,D

第6题：

Which command enables RSTP on a switch?()

A. spanning-tree mode rapid-pvst

B. spanning-tree uplinkfast

C. spanning-tree backbonefast

D. spanning-tree mode mst


参考答案：A

第7题：

Which of the following three port types are valid Spanning Tree port types？（Choose the best threeanswers.）（）

  • A、Designated port
  • B、Nonswitch port
  • C、Switch port
  • D、Nonroot port
  • E、Nondesignated port
  • F、Root port

正确答案:A,E,F

第8题：

In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)

A．Blocking

B．Listening

C．Forwarding

D．Learning

E．Relaying


正确答案：CD
解析：Explanation:
STP uses a couple of port states besides forwarding and blocking.
1. Listening - Listens to incoming Hello messages to ensure that there are no loops, but does not forward traffic. This is an interim state between blocking and forwarding.

2. Learning - Still listens to BPDUs, plus learns MAC addresses from incoming frames. It does not forward traffic. This is an interim state between blocking and forwarding.

3. Disabled - Administratively down.

第9题：

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology？（）

  • A、lowest port MAC address
  • B、port priority number and MAC address
  • C、VTP revision number
  • D、highest port priority number
  • E、path cost

正确答案:E

第10题：

Examine the following options，which Spanning Tree Protocol （STP） protection mechanism disables aswitch port if the port receives a Bridge Protocol Data Unit （BPDU）？（）

  • A、Uplink Fast
  • B、Port Fast
  • C、BPDU Guard
  • D、Root Guard

正确答案:C

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