Talk:Maximum segment size
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It would be nice if the article could point out why an MSS value is necessary, since we already have an MTU and a PMTU; isn't the MSS redundant? 195.56.53.118 22:32, 2 November 2006 (UTC)
Error in article: header size is 40 bytes for IPv4
Per section 18.4 of TCP/IP Illustrated Volume 1, headers total 40 bytes with IPv4. 20 bytes for IP, 20 bytes for TCP, so MSS should be MTU-40.
I've never contributed to Wikipedia, and I don't know anything about IPv6, so I can't say whether that part of the article is accurate or not, so I haven't made an edit.