Why will a switch never learn a broadc

1、Why is listening important in learning

Why is listening important in learning English?

2、[A] why

[A] whyA[B] whenB[C] whileC[D] where

3、Never before（）see such a terrible car

Never before（）see such a terrible car accident on the road!AI haveBhave ICI didDdid I

4、A compressor should never be stopped （

A compressor should never be stopped （）.Awithout first cooling itBwithout first heating itCwithout first unloading itDwithout first loading it

5、A router has learned

A router has learned three possible routes that could be used to reach a destinat...

6、Why will a switch

Why will a switch never learn a broadcast address?（）ABroadcasts only use network layer add...