Thanks for clearing that up; I don't mind being told I'm mistaken. I recently decided that the only way I'm really going to learn from this group is to take a chance on confirming what I THINK I know, and asking questions about what I DON'T know. :) A lesson in humility, to be sure. GM
-----Original Message----- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 08, 2003 5:35 PM To: [EMAIL PROTECTED] Subject: RE: fragmentation question [7:60643] Mossburg, Geoff (MAN-Corporate) wrote: > > Someone correct me if I'm wrong: OK, you're wrong. :-) Look it up or use a protocol analzyer. > All the "fragments" have the TCP/UDP/IP headers, or else they > can't be > routed to their destination. Routing to their destination just requires the IP header, which is in each fragment. The TCP or UDP headers are not in the fragments, past the first one. The IP layer at the end device puts it all back together and hands the packet to the TCP or UDP layer. TCP or UDP get the full packet and can "route" it to the correct process, based on the destination port number. > "Fragmentation" is just a way of breaking up the data payload > into smaller Data payload from IP's point of view. > packets, but it puts individual headers on each packet. > MTU is the total size of each packet, including the header. The term isn't always used that way, though. > GM > > -----Original Message----- > From: Paul Dong So [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, January 08, 2003 4:19 PM > To: [EMAIL PROTECTED] > Subject: fragmentation question [7:60643] > > > Hi All, > > Please shed a light on this as I am confused. > > Fragmentation for UDP/TCP: > * Only the first fragment contains the UDP or TCP header, not > the > sequencial fragments? > > Fragementation for IP packets > * every fragmented packet will contains ip header? > > MTU 1500 bytes, doesn't it mean the data payload can not exceed > 1500 > bytes or the whole packet size(payload+header) can not exceed > 1500 > bytes? > > Thanks in advance > > Paul Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=60658&t=60643 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
