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

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Computer Networking
You have two switches connected together with two crossover cables for redundancy, and STP is disabled. Which of the following will happen between the switches?

Broadcast storms will occur on the switched network.
The switches will automatically load-balance between the two links.
The MAC forward/filter table will not update on the switch.
The routing tables on the switches will not update.

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Computer Networking
The physical layer, in reference to the OSI model, defines

the virtual circuit interface to packet-switched service
All of these
the interface between the X.25 network and packet mode device
data link procedures that provide for the exchange of data via frames that can be sent and received
None of these

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