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Path: utzoo!watmath!clyde!burl!ulysses!harpo!decvax!decwrl!cline@bergil.DEC
From: cline@bergil.DEC (Greg )
Newsgroups: net.lan
Subject: Ethernet Addressing
Message-ID: <236@decwrl.UUCP>
Date: Wed, 16-May-84 08:31:53 EDT
Article-I.D.: decwrl.236
Posted: Wed May 16 08:31:53 1984
Date-Received: Thu, 17-May-84 05:42:08 EDT
Organization: DEC Engineering Network
Lines: 24

<Gone, but not forgotten>

Nodes on Ethernet lines are identified by unique Ethernet addresses.  A
message can be sent to one, several, or all nodes on an Ethernet line
simultaneously, depending on the Ethernet address used.

An Ethernet address is 48 bits in length.  Ethernet addresses are 
represented as six pairs of hexadecimal digits (six bytes), separated
by hyphens (for example, AA-01-23-45-67-FF).  The bytes are displayed
from left to right in the order in which they are transmitted; bits 
within each byte are transmitted from right to left.  In the example,
byte AA is transmitted first; byte FF is transmitted last.

Xerox Corporation assigns a block of addresses to a producer of Ethernet
interfaces upon application.  Thus every manufacturer has a unique set of 
addresses to use.  Normally, one address out of the assigned block of 
physical addresses is permanently associated with each interface.  This 
address is known as the Ethernet hardware address of the interface.

--
Greg Cline, Digital Equipment Corporation
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