Computer Networking
MAC is

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

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Computer Networking
You type the following command into the router and receive the following output:Router#show serial 0/0 ^% Invalid input detected at '^' marker.Why was this error message displayed?

You cannot have a space between serial and 0/0.
You need to be in privileged mode.
Part of the command is missing.
The router does not have a serial0/0 interface.

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Computer Networking
Bus is

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

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