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

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Computer Networking
TCP is:

Connection orientated and unreliable
Connection orientated and reliable
None of these
Connectionless and unreliable
Operates at the Data Link layer

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