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?

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

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Computer Networking
Which of the following is true regarding VLANs?

All VLANs are configured at the fastest switch and, by default, propagate this information to all other switches.
VTP is used to send VLAN information to switches in a configured VTP domain.
You must have at least two VLANs defined in every Cisco switched network.
You should not have more than 10 switches in the same VTP domain.

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