Application Layer
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The Application Layer is the seventh level of the seven-layer OSI model, and the top layer of the TCP/IP model. It interfaces directly to and performs common application services for the application processes; it also issues requests to the Presentation Layer (OSI).
The common application layer services provide semantic conversion between associated application processes. Note: Examples of common application services of general interest include the virtual file, virtual terminal, and job transfer and manipulation protocols.
The application layer of the TCP/IP model corresponds to the entire group of application layer, Presentation Layer, and Session Layer in the seven layer OSI model.
| The TCP/IP model (RFC 1122) |
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| Application Layer |
| BGP · DHCP · DNS · FTP · Gopher · GTP · HTTP · IMAP · IRC · NNTP · NTP · POP · RIP · RPC · RTCP · RTP · RTSP · <a href="/wiki/Session_Description_Protocol" titl |