Well-Known TCP Port Numbers
In TCP/IP and UDP networks, a port is an endpoint
to a logical
connection and the way a client program specifies a specific server program
on a computer in a network. Some ports have numbers that are reassigned to
them by the IANA,
and these are known as well-known ports (specified in RFC 1700). Port numbers range from 0
to 65536, but only ports numbers 0 to 1024 are reserved for privileged
services and designated as well-known ports. This list of well-known port
numbers specifies the port used by the server process as its contact port.
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