Computer Networking
A front-end processor is

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
preliminary processor of batch jobs.
None of these
a user computer system

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Computer Networking
The packets switching concept was first proposed

All of these
in the late 1950s for Defense Ministry of US
in the late 1980s for the Defense Ministry of US.
None of these
in the early 1960s for military communication systems, mainly to handle speech

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