What are common port numbers?

Here are some common port numbers and their associated services:

1. HTTP: Port 80 - Used for web traffic.
2. HTTPS: Port 443 - Used for secure web traffic.
3. FTP: Port 21 - Used for File Transfer Protocol.
4. SSH: Port 22 - Used for Secure Shell, a protocol for secure remote login.
5. Telnet: Port 23 - Used for unencrypted text communications.
6. SMTP: Port 25 - Used for Simple Mail Transfer Protocol, primarily for email sending.
7. DNS: Port 53 - Used for Domain Name System queries.
8. POP3: Port 110 - Used for Post Office Protocol version 3, for receiving emails.
9. IMAP: Port 143 - Used for Internet Message Access Protocol, also for receiving emails.
10. MySQL: Port 3306 - Used for MySQL database connections.

These ports are commonly used in networking and help facilitate various services and applications.