TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) ports are fundamental components of computer networking. They serve as endpoints for communication, allowing data to be directed to specific services or applications on a device within a network. TCP and UDP both work on layer 4 of the OSI-model.

TCP uses ports to establish reliable and ordered connections between devices. Each TCP port is associated with a unique service or application. For example, port 80 is commonly used for HTTP ( web ) traffic, while port 22 is reserved for SSH and SFTP communication.

UDP is a connectionless protocol that uses ports for communication. Unlike TCP, UDP does not establish a connection before sending data. UDP ports are often used for services that prioritize speed over reliability, such as real-time video streaming or online gaming.

You can take a look at a list which contains many TCP / UDP Ports here.