Copyright 2002 by
Prentice Hall, Inc.
6-7
OSI Reference Model:
The Seven Layers
The Seven Layers
n7 - Application Layer:
contains the protocols embedded
in the applications used, e.g., HTTP, FTP for transferring files in Internet, X.500 Directory Services, X.400 Mail Handling, postscript
n6 - Presentation: translate data to and from language and format of 7; e.g. NetBIOS to communicate among peripherals
n5 - Session: control the dialog for a session and acts as a moderator and sees that messages are sent as directed;
e.g., Secure Sockets Layer (SSL) to provide Internet security