Computer Networking
Which of the following describe router functions?

Packet filtering
All of these
Packet switching
Internetwork communication
Path selection

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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
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)
Statistical multiplexers need buffers while multiplexers do not need buffers

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Computer Networking
What is route poisoning?

It describes when a router sets the metric for a downed link to infinity.
It prevents regular update messages from reinstating a route that has just come up.
It is information received from a router that can't be sent back to the originating router.
It sends back the protocol received from a router as a poison pill, which stops the regular updates.

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