Computer Networking
How many digits of the Network User Address are known as the DNIC (Data Network Identification Code)?

None of these
first four
first three
first seven
first five

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Computer Networking
What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

Floods the network with the frame looking for the device
Sends back a message to the originating station asking for a name resolution
Forwards the switch to the first available link
Drops the frame

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