Computer Networking
Which of the following modes are valid when a switch port is used as a VLAN trunk?1. Blocking2. Dynamic auto3. Dynamic desirable4. Nonegotiate5. Access6. Learning

1, 2 and 6
2, 4, and 5
2, 3 and 4
4, 5 and 6

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Computer Networking
Bandlimited signal is

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

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

None of these
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
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

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