Content deleted Content added
No edit summary Tags: Reverted Visual edit Mobile edit Mobile web edit |
Undid revision 1287558317 by 24.188.68.127 (talk) |
||
Line 207:
==Comparison of TCP/IP and OSI layering==
{{See also|OSI model#Comparison with TCP/IP model}}
The three top layers in the OSI model, i.e. the application layer, the presentation layer and the session layer, are not distinguished separately in the TCP/IP model which only has an application layer above the transport layer. While some pure OSI protocol applications, such as [[X.400]], also combined them, there is no requirement that a TCP/IP protocol stack must impose monolithic architecture above the transport layer. For example, the NFS application protocol runs over the [[External Data Representation]] (XDR) presentation protocol, which, in turn, runs over a protocol called [[Remote Procedure Call]] (RPC). RPC provides reliable record transmission, so it can safely use the best-effort UDP transport.
| |||