Computer Networking
Carrier is

a continuous frequency capable of being modulated or impressed with a second signal
a collection of interconnected functional units that provides a data communications service among stations attached to the network
One or more conductors that serve as a common connection for a related group of devices
the condition when two or more sections attempt to use the same channel at the same time
None of these

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

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