4 ms·
IP header has flexible size, up to 60 bytes: https://networkengineering.stackexchange.com/questions/6855/maximum-ipv4-header-size https://networkengineering.sta
by jstimpfle 9y ago
IP header has flexible size, up to 60 bytes: https://networkengineering.stackexchange.com/questions/6855/maximum-ipv4-header-size https://networkengineering.stackexchange.com/questions/6855/...
- bogomipz 9y agoSure but on the actual internet how often are IP headers larger than 20 bytes because options are turned on? Not very often. The 20 bytes each for TCP and IPv4 is a pretty good assumption. From the paper "IP Options are not an option" which is good quick read: "We have studied the dependability of IP options-enabled network packets in the Internet. We found that overall, approximately half of Internet paths drop packets with options"[1] [1] https://www2.eecs.berkeley.edu/Pubs/TechRpts/2005/EECS-2005-24.pdf https://www2.eecs.berkeley.edu/Pubs/TechRpts/2005/EECS-2005-...
- jstimpfle 9y agoThanks, that's good to know. I've wondered if these options are used in the past.