Application layer
From open-encyclopedia.com - the free encyclopedia.
| OSI Model |
| Application layer |
| Presentation layer |
| Session layer |
| Transport layer |
| Network layer |
| Data link layer |
| Physical 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.
| Application layer | HTTP, SMTP, FTP, SSH, IRC, SNMP ... |
| Transport layer | TCP, UDP, SCTP, RTP, DCCP ... |
| Network layer | IPv4, IPv6, ARP, IPX ... |
| Data link layer | Ethernet, 802.11 WiFi, Token ring, FDDI, ... |
Examples
- HTTP
- SMTP
- SNMP
- FTP
- XMPP
- Telnet
- FTAM
- APPC
- X.400
- SSH
- X.500
- IRC
- AppleTalk
- AFP
- Lightweight Directory Access Protocol (LDAP)
fr:Couche application
