Application_layer Application_layer

Application layer - Definition and Overview

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OSI Model
Application layer
Presentation layer
Session layer
Transport layer
Network layer
Data link layer
Physical layer


The application layer is the seventh (7.) 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   edit  (http://www.wordiq.com/definition/Template:IPstack)
Application layer HTTP, SMTP, FTP, SSH, IRC, SNMP, SIP ...
Transport layer TCP, UDP, SCTP, RTP, DCCP ...
Network layer IPv4, IPv6, ARP, ICMP ...
Data link layer Ethernet, 802.11a/b/g WiFi , Token ring, FDDI, ...

Examples

Example Usage of Application

Chess_T21: "Visor": a completely free Application for both professionals and amateurs chess players. >> http://chessvisor.com/
dnziphoneDev: #iphone #job - iPhone Application Writer (Max. $500) - http://donanza.com/t/1121516 #jobs
emperor_ing: Well Newcastle Uni has my Application.
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