Details about Application Layers
The Application Layer of the TCP/IP stack acts as the front end for the protocols in the lower-layer category. Some of the more important protocols and applications that run in this layer are the Hypertext Transfer Protocol (HTTP), the File Transfer Protocol (FTP), the Simple Mail Transfer Protocol (SMTP), the Simple Network Management Protocol (SNMP), the Secure Shell (SHH), the Internet Relay Chat (IRC), and the Telnet. Read the academic writing provided by Order Custom Paper further to learn more about the topic.
The Hypertext Transfer Protocol (HTTP) is the main protocol that is used for communication across the Web. The File Transfer Protocol (FTP) makes for enabling different operating systems (OS’s). The Simple Mail Transfer Protocol (SMTP) is the primary protocol used to transmit email messages over the Internet. The Simple Network Management Protocol (SNMP) is mainly used for the monitoring of devices on networks. For example, the purpose could be to monitor the state of a router remotely. The Secure Shell (SHH) allows remote users to log on to servers in a secure manner and to interactively issue commands. The Internet Relay Chat (IRC) allows more than one user to communicate across the internet with the help of discussion forums. And last, but not least, the Telnet allows users of a system to remotely log on to servers and interactively issue commands.
What is the application layer?
The Application Layer is basically an abstraction layer (a level used to hide implementation details of some set of functionality). It is used to specify shared protocols as well as interface methods utilized by hosts in communication networks. For TCP/IP, this layer has as part of it interface methods and communication protocols. It standardizes the communication and makes use of the transport layer to form data transfer channels that work host-to-host. Though it does not specify rules or formats for data that applications should take into account while communicating, it does specify the “robustness principle” for the design of applications.
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