Application layer
The application layer is the seventh level of the seven layer OSI model. It interfaces directly to and performs common application services for the application processes; it also issues requests to the presentation layer.
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.
Internet protocol suite
| Application layer |
HTTP, SMTP, FTP, SSH, IRC, SNMP ...
|
| Transport layer |
TCP, UDP, SCTP, RTP, ...
|
| Network layer |
IP, IPv6, ARP, IPX ...
|
| Data link layer |
Ethernet, 802.11 WiFi, Token ring, FDDI, ...
|
Examples
