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

Fiber optic cables
Telecommunications processors
Telecommunications software
Cellular phone systems

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Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

A physical address that is randomly assigned each time the computer is started
The logical domain address for the workstation
A logical address that identifies the workstation
An alias for the computer name
A physical address that is assigned by the manufacturer

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Computer Networking
You save the configuration on a router with the copy running-config startup-config command and reboot the router. The router, however, comes up with a blank configuration. What can the problem be?

The configuration register setting is incorrect.
NVRAM is corrupted.
You didn
The newly upgraded IOS is not compatible with the hardware of the router.

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