On Fri, May 09, 2008 at 10:49:30AM -0500, Billy Crook wrote:
On Fri, May 9, 2008 at 10:15 AM, Ed Allen [email protected] wrote:
FTP being based on UDP is connectionless so no worries about TCP connections being trashed by confusion over IP addresses.
Cough Cough http://www.faqs.org/rfcs/rfc959.html Cough...
Hardly worth wading through 150K because you wanted to point out that FTP has been switched to TCP.
Any other reason you think I should spend time reading that ?
A TCP stack does that too. http://www.faqs.org/rfcs/rfc793.html (Page 4, Section: Reliability)
TCP acks each packet. UDP is "send it and hope it gets there".
So TCP needs a channel back to the sending box for those ACKs while UDP just takes what it gets and the software above needs to check for completeness.
Even so I do not see a problem with sending alternate packets through two IP addresses for outgoing as the ACKs will choose one to reply through ignoring the other as a "more expensive" route.