题目内容

A hub（集线器）is a ( )device that acts on individual bits rather than on frames.

A. physical-layer
B. link-layer
C. network-layer
D. ransport-layer

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A switch is a( )device that acts on frame.

A. physical-layer
B. link-layer
C. network-layer
D. ransport-layer

The ability to determine whether a frame should be forwarded to some interface or should just be dropped is ( ).

A. filtering
B. forwarding
C. self-learning
D. optimal routing

Which device has the same collision domain? ( )

A. Hub
B. Switch
C. Router
D. Bridge

When two or more nodes on the LAN segments transmit at the same time, there will be a collision and all of the transmitting nodes well enter exponential back-off, that is all of the LAN segments belong to the same( ).

A. collision domain
B. switch
C. bridge
D. hub