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 mail
Global network
Electronic newspaper
Paperless office
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?

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

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Computer Networking
The corporate office sends you a new router to connect, but upon connecting the console cable, you see that there is already a configuration on the router. What should be done before a new configuration is entered in the router?

Flash should be erased and the router restarted.
NVRAM should be erased and the router restarted.
The new configuration should be entered and saved.
RAM should be erased and the router restarted.

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