Computer Networking
Bandlimited signal is

All of these
a signal all of whose energy is contained within a finite frequency range
None of these
simultaneous transmission of data to a number of stations
transmission of signals without modulation

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Computer Networking
The difference between a multiplexer and a statistical multiplexer is

Statistical multiplexers need buffers while multiplexers do not need buffers
Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
None of these

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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?

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

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