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?

None of these
Paperless office
Electronic newspaper
Electronic mail
Global network

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Computer Networking
Demodulation is the process of

converting digital signals to analog signals
converting analog signals to digital signals
combining many low speed channels into one high speed channel
dividing the high-speed signals into frequency bands
None of these

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Computer Networking
Which command will create a dynamic pool named Todd that will provide you with 30 global addresses?

ip nat pool Todd 171.16.10.1 171.16.10.254 net 255.255.255.0
ip nat pool todd 171.16.10.65 171.16.10.94 net 255.255.255.224
ip nat pool Todd 171.16.10.65 171.16.10.94 net 255.255.255.224
ip nat pool Todd 171.16.10.65 171.16.10.94 net 255.255.255.240

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Computer Networking
Parity bit is

None of these
the ratio of the number of data units in error to the total number of data units
a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
a check bit appended to an array of binary digits to make the sum of all the binary digits.
an error-detecting code based on a summation operation performed on the bits to be checked.

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