Computer Networking
Synchronous protocols

transmit characters one at a time
are more reliable
are generally used by personal computers
allow faster transmission than asynchronous protocols do
None of these

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Computer Networking
X.21 is

None of these
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
a method of determining which device has access to the transmission medium at any time

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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 IOS became corrupted after the copy command was initiated.
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.

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