port numbers

Port numbers are like digital channels on a computer or network device that direct specific types of data to the right applications. When you use services like email, web browsing, or streaming, data is sent through these ports to reach the correct program. Each port has a number—ranging from 0 to 65535—that helps identify the specific service or application communicating over the network. Think of ports as numbered doors on a building: they ensure the right data gets to the right room, enabling efficient and organized digital communication.