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
14 slots
7 slots
10 slots
None of these

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Computer Networking
You want to create a standard access list that denies the subnet of the following host: 172.16.50.172/20. Which of the following would you start your list with?

access-list 10 deny 172.16.48.0 255.255.240.0
access-list 10 deny 172.16.64.0 0.0.31.255
access-list 10 deny 172.16.48.0 0.0.15.255
access-list 10 deny 172.16.0.0 0.0.255.255

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Computer Networking
You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

The copy did not override the shutdown command in running-config.
You copied the wrong configuration into RAM.
You copied the configuration into flash memory instead.
The IOS became corrupted after the copy command was initiated.

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Computer Networking
X.21 is

a method access control technique for multiple-access transmission media
None of these
network access standard for connecting stations to a circuit-switched network
a very common bit-oriented data link protocol issued by ISO
a method of determining which device has access to the transmission medium at any time

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