Computer Networking
Which of the following communications modes support two-way traffic but in only one direction of a time?

None of these
three-quarters duplex
full-of the above
half-duplex
simplex

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Computer Networking
Which two of the following are true regarding the distance-vector and link-state routing protocols?1. Link state sends its complete routing table out all active interfaces on periodic time intervals.2. Distance vector sends its complete routing table out all active interfaces on periodic time intervals.3. Link state sends updates containing the state of its own links to all routers in the internetwork.4. Distance vector sends updates containing the state of its own links to all routers in the internetwork.

3 only
1 only
2 and 3 only
None of these

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

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

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