單項選擇題While troubleshooting a connectivity problem, a network administrator notices that a port status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate()。

A.The port is experiencing errors
B.The port is administratively disabled
C.The port is blocked by spanning tree
D.The port has an active link with normal traffic activity


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A.X.25
B.幀中繼
C.dialer
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2.多項選擇題What are some of the advantages of using a router to segment the network?()

A.Filtering can occur based on Layer 3 information.
B.Broadcasts are eliminated.
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3.單項選擇題OSI中,哪些不是表示層功能?()

A.數(shù)據(jù)加密
B.數(shù)據(jù)壓縮
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5.多項選擇題Which of the following are true regarding bridges and switches?()

A.Bridges are faster than switches because they have fewer ports.
B.A switch is a multiport bridge.
C.Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.
D.A bridge will forward a broadcast but a switch will not.
E.Bridges and switches increase the size of a collision domain.

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