Computer Networking
Contention is

the condition when two or more stations attempt to use the same channel at the same time
a collection of interconnected functional units that provides a data communications service among stations attached to the network
a continuous frequency capable of being modulated or impressed with a second signal
One or more conductors that serve as a common connection for a related group of devices
None of these

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

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

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Computer Networking
You need to create an access list that will prevent hosts in the network range of 192.168.160.0 to 192.168.191.0. Which of the following lists will you use?

access-list 10 deny 192.168.160.0 0.0.31.255
access-list 10 deny 192.168.0.0 0.0.31.255
access-list 10 deny 192.168.160.0 255.255.224.0
access-list 10 deny 192.168.160.0 0.0.191.255

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