Computer Networking
Eight stations are competing for the use of a shared channel using the 'Adaptive tree Walk Protocol'. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?

5 slots
7 slots
10 slots
None of these
14 slots

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Computer Networking
What is route poisoning?

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.
It prevents regular update messages from reinstating a route that has just come up.
It describes when a router sets the metric for a downed link to infinity.

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Computer Networking
A WATS arrangement

is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
is always less expensive than flat-rate service
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
None of these
is never less expensive than flat-rate service

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