Computer Networking
The packets switching concept was first proposed

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

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Computer Networking
"BAUD" rate means

The number of bits transmitted per unit time.
None of these
The rate at which the signal changes.
The number of bytes transmitted per unit time.

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