Computer Networking
A communications medium that uses pulses of laser light in glass fibers. Select the best fit for answer:

Fiber optic cables
Cellular phone systems
Telecommunications processors
Telecommunications software

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Computer Networking
What does the passive command provide to dynamic routing protocols?

Stops the router from receiving any dynamic updates.
Stops the router from sending any dynamic updates.
Stops an interface from sending periodic dynamic updates but not from receiving updates.
Stops an interface from sending or receiving periodic dynamic updates.

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

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