Computer Networking
The application layer of a network

All of these
None of these
defines the user's port into the network
consists of software being run on the computer connected to the network
establishes, maintains, and terminates virtual circuits

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Computer Networking
The packets switching concept was first proposed

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

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