Talk:Session layer

Contradiction?
"The Session layer is typically completely unused, but it does have a few places where it is useful." As Wikipedians contribute, we are logged into Wikipedia. How can these two statements both be true?

I take it http 1.0 didn't implement sessions, and that 1.1 does. I don't know whether http sessions are nowadays typical events or exotic events, but I suspect they are typical.

--Munge 21:12, 5 Jan 2005 (UTC)

If we consider a packet header:

IP(3)--TCP(4)--HTTP(5?) --XML(6)--SOAP(7)---

As we already know, IP is layer 3, TCP is Layer 4, XML is layer 6, SOAP is layer 7, if we take HTTP as Layer 5, session layer, it will looks perfect, right?

Qilzhang 10:09, 8 May 2007 (UTC)

I don't think the list of protocols should include anything but L5 protocols. L2TP and L2F, for example, are L2 protocols.

Tskandier (talk) 20:42, 2 August 2011 (UTC)

PPTP is not a session layer, but data link layer
I read in lots of places (also in wikipedia) that PPTP belongs to the data link layer of the OSI model. You can find it PPTP page itself, in this table OSI_model and in lots of places in internet. If nobody will object it, I will remove PPTP from this page in 7 days. --Sena (talk) 08:22, 15 September 2011 (UTC)
 * The PPTP article make not a single mention of OSI, and in the OSI article you cite it is not listed under OSI either, but under the comparison to TCP/IP. Given the strict layering in OSI it would be hard to fit it in below where connection oriented protocols are, but TCP/IP makes no such assumptions, where it certainly acts like a link protocol, but certainly can fit in with the Application Layer as well. Kbrose (talk) 15:27, 15 September 2011 (UTC)

Move discussion in progress
There is a move discussion in progress which affects this page. Please participate at Talk:Physical Layer - Requested move and not in this talk page section. Thank you. —RM bot 03:45, 19 October 2011 (UTC)

More examples?
The article says that the session layer is responsible for authentication and authorization. Does this mean that OpenID and OAuth are examples of services operating at the session layer?

Also, other articles state that the "graceful close" function of TCP is considered part of the session layer. Elaboration on that in this article would seem sensible, as well as elaboration on the other ways in which aspects of TCP can be classified as part of the session layer. — Preceding unsigned comment added by 2620:83:8001:572:0:0:1:8AF (talk) 15:45, 1 June 2018 (UTC)


 * According to what I have read about the session layer, authentication and authorization are not essential parts of it, so I have removed them from the article.
 * I have also added elaboration about "graceful closing" to the article. I don't understand why it was not already there. According to what I have read, this is the only TCP feature that is part of the session layer.
 * Cooper2222 (talk) 09:31, 9 June 2023 (UTC)