Computer Networking
To set up a bulletin board system you need

a personal computer
None of these
All of these
a smart modem with auto-answer capabilities
a telephone line

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Computer Networking
Which of the following technique is used for Time-To-Line (TTL)?

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size.
a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame
All of these
a technique used in best-effort delivery system to avoid endlessly looping packets.
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 need to be in privileged mode.
The router does not have a serial0/0 interface.
Part of the command is missing.
You cannot have a space between serial and 0/0.

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Computer Networking
Which of the following refers to the terms "residual error rate"?

signal to noise ratio divided by the ratio of energy per bit to noise per hertz
the probability that one or more errors will be detected when an error detection mechanism is used
the number of bit errors per twenty four hours of continuous operation on an asynchronous line
The probability that one or more errors will be undetected when an error detection scheme is used
None of these

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