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?

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

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Computer Networking
A WATS arrangement

is never less expensive than flat-rate service
is always less expensive than flat-rate service
None of these
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short

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