Security Basics mailing list archives
Re: Session layer in OSI and TCP/IP
From: dwg5901 () fhda edu
Date: Tue, 13 Jul 2010 19:05:23 -0700 (PDT)
I would say that's substantially correct, yes. In the world of the Internet as it has evolved, sessions are usually a host-based phenomenon and not a network service. When I began to work with communications between computer systems, it was routine to physically connect to a network, authenticate to establish one's right to use the network, request a connection to a destination (host or service), snd tear that down again once communication was completed. I think the closest you are likely to see to that these days is as a wireless client, authenticating and associating before packets will be transported on your behalf. David Gillett
Hello! I've certain questions regarding how session layer functionalities are implemented in OSI and TCP/IP. I know that there's no session layer in TCP/IP. I just want to focus on its functionalities. According to OSI model session layer provides connection establishment, management and termination. So does this mean that in OSI TCP 3-way handshake and graceful connection termination is initiated by session layer and the transport layer is concerned with data transfer and reliability of communication only? But in TCP/IP the connection establishment and termination along with reliability are part of the transport layer and no session layer is used. Is this statement correct? Eg.- I want to browse a website. a) So according to OSI, firstly I resolve domain name using the DNS in application layer, then my web browser asks the session layer to initiate a session. Session layer asks the transport layer to make suitable TCP packets to perform a 3 way handshake. Then HTTP packets are transported using the transport layer. b) According to TCP/IP, firstly I resolve domain name using DNS in application layer. Then my application layer requests the transport layer to connect to a webserver on port 80. Transport layer makes a TCP 3-way handshake. After connection establishment HTTP packets are transported using transport layer. ------------------------------------------------------------------------ Securing Apache Web Server with thawte Digital Certificate In this guide we examine the importance of Apache-SSL and who needs an SSL certificate. We look at how SSL works, how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates. http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1 ------------------------------------------------------------------------
------------------------------------------------------------------------ Securing Apache Web Server with thawte Digital Certificate In this guide we examine the importance of Apache-SSL and who needs an SSL certificate. We look at how SSL works, how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates. http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1 ------------------------------------------------------------------------
Current thread:
- Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 13)
- <Possible follow-ups>
- Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 13)
- Re: Session layer in OSI and TCP/IP dwg5901 (Jul 14)
- Re: Session layer in OSI and TCP/IP sandthakur (Jul 14)
- Re: Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 16)
- Re: Session layer in OSI and TCP/IP dwg5901 (Jul 19)
- Re: Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 19)
- Re: Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 19)
- Re: Session layer in OSI and TCP/IP Andy Colson (Jul 19)
- Re: Session layer in OSI and TCP/IP orlin (Jul 19)
- Re: Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 16)
- Re: Session layer in OSI and TCP/IP Kurt Buff (Jul 19)
- Re: Session layer in OSI and TCP/IP Charlie Clark (Jul 19)
- Re: Session layer in OSI and TCP/IP Naruto Uzumaki (Jul 19)