As per Relevance of the word assigned, we have this rfc below:

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Network Working Group M.
Request For Comments: 1078 SRI-
November 1988


TCP Port Service Multiplexer (TCPMUX

Status of this

This RFC proposes an Internet standard which can be used by
TCP services instead of using 'well-known ports'. Distribution
this memo is unlimited



Ports are used in the TCP to name the ends of logical
which carry long term conversations. For the purpose of
services to unknown callers, a service contact port is defined.
contact port is sometimes called the "well-known port". Standard
services are assigned unique well-known port numbers in the range
0-255. These ports are of limited number and are typically
assigned to official Internet protocols

This RFC defines a protocol to contact multiple services on a
well-known TCP port using a service name instead of a well-
number. In addition, private protocols can make use of the
without needing an official TCP port assignment

The

A TCP client connects to a foreign host on TCP port 1. It sends
service name followed by a carriage-return line-feed .
service name is never case sensitive. The server replies with
single character indicating positive ("+") or negative ("-")
acknowledgment, immediately followed by an optional message
explanation, terminated with a . If the reply was positive
the selected protocol begins; otherwise the connection is closed

Service

The name "HELP" is reserved. If received, the server will output
multi-line message and then close the connection. The reply to
name "HELP" must be a list of the service names of the
services, one name per line

The names listed in the "Protocol and Service Names" section of
current edition of "Assigned Numbers" (RFC-1010 at this time)
reserved to have exactly the definitions specified there.



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RFC 1078 TCPMUX November 1988


with distinct assigned ports must be available on those ports and
optionally be available via this port service multiplexer on port 1.

Private protocols should use a service name that has a high chance
being unique. A good practice is to prefix the protocol name
the name of your organization

Multiple versions of a protocol can suffix the service name with
protocol version number

Implementation

A negative reply will typically be returned by the port-
process when it can't find the requested service. A positive
will typically be returned by the process invoked by the
multiplexer for the requested service



































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if you see any problems within the linking, don't worry be happy,
this is version 0.1 of the Relevance System and you gotta expect some crappy subroutines sometimes,
just be content we did not write this in Java, which would have made this "bigger and better" HAHAHHA.



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