What size is Preamble?

Covington

By Wendell Odom it is 8 bytes, in Cisco page I found that it is 7 bytes: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ethernet.htm#wp1020622

What size it is?

kplab

It is 8-byte including the 1-byte SOF. The Cisco web page explains the preamble and SOF separately, so that it said the preamble is 7-byte.

Covington

So, the SOF is a part of preamble, or we can not it combine.