Network Working Group E.I. Ancona
Request for Comments: 42 M.I.T. Lincoln Laboratory
31 March 1970
Message Data Types
Proposal:
We propose that the first eight bits of a normal message be reserved
for a message data type. Adoption of this convention does not in any
way signify agreement as to the actual data types to be used. It
merely establishes the convention that the first eight bits of every
normal message are not available for user data.
Discussion:
Socket Port
| | | ____________
| V V / \
V / \
|=| /==| |
-------(+)->|Y|-->|X|