What is the function of TCP port 80?

TCP port 80 is primarily used for HTTP (Hypertext Transfer Protocol), which is the foundation of data communication on the World Wide Web. When a web browser attempts to access a web page, it typically does so via HTTP, which operates over TCP port 80. This protocol facilitates the transfer of hypertext requests and information on the internet, allowing users to view web pages and interact with web applications.

Understanding the primary role of TCP port 80 is crucial for network security professionals, as it is a common target for various types of attacks, including those aimed at web servers. By knowing that TCP port 80 is associated with HTTP, one can implement appropriate security measures to protect web traffic and ensure that data transmitted over this port is secured and appropriately monitored.