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 pre-assigned 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.
