The Application Layer

Learn about the purpose of the application layer and the two main protocols that it follows.

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The application layer relies on the transport layer for the data transfer and is responsible for defining the syntax and semantics of this data as well as the protocol of exchanges between the two sides.

This is probably the most crowded layer with a vast number of protocols. In this lesson, we will explore two of the protocols that form the foundation of the world wide web, namely: Domain Name System (DNS) protocol and the Hypertext Transfer Protocol (HTTP).

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