Common ports in networking serve as standardized endpoints for communication, facilitating the efficient exchange of data between devices. These ports are essential for ensuring that applications and services can communicate seamlessly, following established protocols. For instance, port 80 is commonly associated with HTTP (Hypertext Transfer Protocol) for web browsing, while port 443 is reserved for secure HTTPS (Hypertext Transfer Protocol Secure). Another example is port 25, designated for SMTP (Simple Mail Transfer Protocol), enabling the transfer of email messages. The use of standardized ports allows for consistency and interoperability in networking, ensuring that different devices and applications can understand and communicate with each other effectively.