From: Ricardo Ferreira (ricardo.ferreira@quadcomm.com.br)
Date: Sun Jul 18 2004 - 16:36:36 GMT-3
Hi,
Check this info.... It is quite useful and will help you understand he
differences.....
http://www.wildpackets.com/compendium/EN/EN-FrFmt.html#Table
----- Original Message -----
From: "Ned" <ccie2004@excite.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, July 18, 2004 4:14 PM
Subject: Ethernet Questions
> Can anyone shed a little light on the difference between ethernet
types(802.2, 802.3, Ethernet 2) and what is the minimum and maximum frame
size. Ihave read different information on various sites. Also, when referred
to Ialways assume in relation to ethernet that when they say octet it means
thesame as bytes like for eg. max ethernet frame is 1518 octets(?? is
thatcorrect).My thoughts:802.2 (Ethernet 2) has the type field802.3 has the
length field**That's the general difference but can someone elaborate. For
eg. DSAP,SSAP. What ethernet type is commonly used and how to tell which one
is beingused without a packet analyzer.Max User Data: 1460 BytesMax Frame
Size: 1518 Bytes (1460 + 20( ip header) + 20 (tcp header) + 18Bytes for the
Ethernet Header (this does not include the preamble and theStart of frame
Delimiter)What would the payload be? (would it include the ethernet header
or would itbe 1500 which is the 1460 + tcp header + ip header)I have asked
quite a few questions !
> but I really want to make sure I have agood understanding of this and if
I don't I would really like to. Thanks abunch.
>
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