Computer Networking
HMP (Host Monitoring Protocol) is:

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

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Computer Networking
The main difference between synchronous and asynchronous transmission is

the clocking is derived from the data in synchronous transmission
the bandwidth required is different
None of these
the clocking is mixed with the data in asynchronous transmission
the pulse height is different.

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