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?

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

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Computer Networking
What is a stub network?

A network with more than one exit and entry point.
A network with only one entry and no exit point.
A network that has only one entry and exit point.
A network with more than one exit point.

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