Computer Networking
After coding a document into a digital signal, it can be sent by telephone, telex or satellite to the receiver where the signal is decoded and an exact copy of the original document is made. What is it called?

Electronic mail
Telex
Word processor
None of these
Facsimile

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Computer Networking
UDP is:

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

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Computer Networking
The network layer, in reference to the OSI model, provide

None of these
the virtual circuit interface to packet-switched service
the interface between the X.25 network and packet mode device
data link procedures that provide for the exchange of data via frames that can be sent and received
All of these

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