Editing Application layer (section)

==Internet protocol suite==
{{IP stack}}
In the Internet protocol suite, the application layer contains the communications protocols and interface methods used in process-to-process communications across an [[Internet Protocol]] (IP) computer network.<ref>{{Cite web|url=https://searchnetworking.techtarget.com/answer/What-is-the-difference-between-TCP-IP-and-IP-protocol|title=What is the difference between TCP/IP and IP protocol?|website=SearchNetworking|language=en|access-date=2019-11-05}}</ref> The application layer only standardizes communication and depends upon the underlying [[transport layer]] protocols to establish host-to-host data transfer channels and manage the data exchange in a [[client–server]] or [[peer-to-peer]] networking model.<ref>{{Cite web|url=https://www.lifewire.com/transmission-control-protocol-and-internet-protocol-816255|title=What Is Transmission Control Protocol/Internet Protocol (TCP/IP)?|last1=SEO|first1=Bradley Mitchell An MIT graduate who brings years of technical experience to articles on|last2=computers|website=Lifewire|language=en|access-date=2019-11-05|last3=Networking|first3=Wireless}}</ref> Though the TCP/IP application layer does not describe specific rules or data formats that applications must consider when communicating, the original specification (in {{IETF RFC|1123}}) does rely on and recommend the [[robustness principle]] for application design.<ref name=rfc1123>{{cite web
| title = RFC 1123: Requirements for Internet Hosts – Application and Support
| url = http://tools.ietf.org/html/rfc1123
| publisher = Network Working Group of the IETF
| editor = Robert Braden
| date = October 1989
}}</ref><ref>{{Cite web|url=https://www.techopedia.com/definition/6006/application-layer|title=What is the Application Layer?|website=www.tutorialspoint.com|access-date=2019-11-05}}</ref>