Computer Networking
If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

Add the destination to the MAC address table and then forward the frame
Discard it and send an error message back to the originating host
Flood the network with the frame
Add the source address and port to the MAC address table and forward the frame out the destination port

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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?

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

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Computer Networking
Communication network is

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

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