Computer Networking
Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?

Electronic newspaper
None of these
Global network
Paperless office
Electronic mail

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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?

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

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Computer Networking
UDP is:

Connection oriented and unreliable
None of these
Connection orientated and reliable
Not a part of the TCP/IP suite
Connectionless and unreliable

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