Computer Networking
A T-switch is used to

echo every character that is received
control how messages are passed between computers
rearrange the connections between computing equipment
None of these
transmit characters one at a time

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Computer Networking
HMP (Host Monitoring Protocol) is:

a TCP/IP high level protocol for transferring files from one machine to another.
a protocol that handles error and control messages
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
None of these

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