keep in mind that OSI is a reference model, and may or may not have anything to do with the way things really work. if I am using my word processor, and want to open a file located Out There, I perform a couple of actions, each of which triggers subroutines in the word processor, which in turn passes calls to the OS which in turn performs certain actions, including interfacing with network hardware. For purposes of discussion one might say that things are being passed up and down the OSI layers, but practically speaking, all that is happening is that bits are being pushed and pulled out of processor registers.
In terms of OSI, layer 4 is responsible for the call setup and maintaining end to end communication. I have yet to figure out what the session layer does. I doubt that even Howard can explain it so it makes sense. In fact, IIRC, Howard once said that the session layer exists because a committee was set up to work on it, and the CCITT of course "had" to incorporate their work into the model. ( forgive me if I misremember your comment, Howard. It's been a while ) Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of mlh Sent: Friday, December 07, 2001 12:00 AM To: [EMAIL PROTECTED] Subject: Does session layer protocol use IP address ? [7:28378] Hi, there, I read Todd Lammle's CCNA2.0 study guide and found this sentence: "Remember that none of the upper layers know anything about networking or network addresses." I am wondering if the session layer doesn't use network address, how can it establish a dialogue with other session layer in other host? Thank you for your time. mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28416&t=28378 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
