Computer Networking
Which of the following condition is used to transmit two packets over a medium at the same time?

Contention
None of these
Asynchronous
Collision
Synchronous

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Computer Networking
What is the problem with an interface if you type show interface serial 0 and receive the following message? "Serial0 is administratively down, line protocol is down."

The administrator has the interface shut down.
The administrator is pinging from the interface.
No cable is attached.
The keepalives are different times.

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