Computer Networking
Most data communications involving telegraph lines use:

None of these
narrowband channels
simplex lines
dialed service
wideband channels

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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.
You copied the wrong configuration into RAM.
The copy did not override the shutdown command in running-config.
You copied the configuration into flash memory instead.

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Computer Networking
Synchronous protocols

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

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