Computer Networking
The packets switching concept was first proposed

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

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Computer Networking
HMP (Host Monitoring Protocol) is:

a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol used to monitor computers
a TCP/IP high level protocol for transferring files from one machine to another.
None of these
a protocol that handles error and control messages

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