Computer Networking
The packets switching concept was first proposed

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

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Computer Networking
What is a stub network?

A network with only one entry and no exit point.
A network that has only one entry and exit point.
A network with more than one exit and entry point.
A network with more than one exit point.

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