Computer Networking
A remote batch-processing operation in which data is solely input to a central computer would require a:

mixedband channel
All listed here
simplex lines
telegraph line
None of these

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Computer Networking
The main difference between TCP and UDP is

UDP is a datagram where as TCP is a connection oriented service
None of these
UDP is connection oriented where as TCP is datagram service
TCP is an Internet protocol where as UDP is an ATM protocol
All of these

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Computer Networking
Bulletin board system

None of these
converts digital signals to analog signals
is a modem capable of accepting commands
converts analog signals to digital signals
is a public access message system

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