Computer Networking
How many digits of the Network User Address are known as the DNIC (Data Network Identification Code)?

None of these
first seven
first three
first four
first five

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Computer Networking
A front-end processor is

preliminary processor of batch jobs.
a processor in a large-scale computer that executes operating system instructions
a minicomputer that relieves main-frame computers at a computer centre of communications control functions
a user computer system
None of these

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