Computer Networking
To set up a bulletin board system you need

a personal computer
a telephone line
All of these
a smart modem with auto-answer capabilities
None of these

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Computer Networking
MAC is

None of these
network access standard for connecting stations to a circuit-switched network
a method of determining which device has access to the transmission medium at any time
a very common bit-oriented data link protocol issued to ISO.
a method access control technique or multiple-access transmission media

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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?

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

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