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The nettest and nettestd commands invoke client and server
programs that are used for timing data throughput of vari-
ous methods of interprocess communication. For TCP and
OSI connections, the nettest program establishes a connec-
tion with the nettestd program, and then it does count
writes of size bytes, followed by count reads of size
bytes. For UDP, the nettest program performs only writes;
reads are not performed. The nettestd program, if used
with UDP connections, reads the data packets and prints a
message for each data packet it receives. The number and
size of the reads and writes may not correlate with the
number and size of the actual data packets that are trans-
ferred; it depends on the protocol that is chosen. If you
append an optional k (or K) to the size, count, or bufsize
value, the number specified is multiplied by 1024.
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