2. 计算机
  3. In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)

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

admin2009-05-19  14
问题 In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)
选项 A、Blocking
B、Listening
C、Forwarding
D、Learning
E、Relaying
答案C,D
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.
转载请注明原文地址:https://jikaoti.com/ti/IQO7FFFM
本试题收录于： 思科640802题库思科认证分类
0

思科640802

思科认证

相关试题推荐
随机试题
最新回复(0)