From: Ned (ccie2004@excite.com)
Date: Sun Jul 18 2004 - 16:14:28 GMT-3
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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