the session layer is responsible for setting up, managing, and then tearing down sessions between presentation layer entities. session layer also provides dialog control between devices or nodes. It coordinates communication between systems and serves to organize their communication by offering there different modes: simplex, half duplex and full duplex. to sum up, the Session layer basically keeps different applications data separate from applications data.
Session Layer Protocols and Their General Functionality :
- Network File System (NFS) : Accesses remote resources transparently and represents files and directories as if local to the user system. Developed by SUN and used on Unix workstations.
- Structured Query Language (SQL) : Functions as a query language that requests, updates, and manages databases. Developed by IBM and compatible with XML and HTML.
- Remote Procedure Call (RPC) : Basis for client/server communications. Calls are created on the client and then carried out on the server.
- AppleTalk Session Protocol (ASP) : Also client/server–based communications, but specific to AppleTalk client and server devices.
- X Window : Communicates with remote Unix machines and enables the user to operate the device as if attached locally.
- Digital Network Architecture Session Control Protocol (DNA SCP) : A proprietary Digital Equipment Corporation Networking (DECnet) protocol, also referred to as a DECnet session.
Glossary review :
0 comments:
Post a Comment