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

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

Network collisions occur
"Line echo" occurs due to the impedance of the cable
Repeaters cannot increase the signal strength sufficiently
Cable terminators do not absorb the signal properly
Cable terminators do not reflect the signal properly

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