Computer Networking
Which of the following statements is correct for the use of packet switching?

by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied
All of these
None of these
the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individ

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

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

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