Ports

Network Ports

In computer networking, a port is a communication endpoint used in the transport layer of the Internet Protocol (IP) suite of protocols. Ports enable computers to distinguish between different types of traffic and applications running on a network. There are two types of ports: TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).

Below is a list of commonly used network ports:

• FTP (File Transfer Protocol) - Port 21

• SSH (Secure Shell) - Port 22

• Telnet - Port 23

• SMTP (Simple Mail Transfer Protocol) - Port 25

• DNS (Domain Name System) - Port 53

• DHCP (Dynamic Host Configuration Protocol) - Port 67 and 68

• TFTP (Trivial File Transfer Protocol) - Port 69

• HTTP (Hypertext Transfer Protocol) - Port 80

• POP3 (Post Office Protocol) - Port 110

• NTP (Network Time Protocol) - Port 123

• NetBIOS - Port 139 and 445

• SNMP (Simple Network Management Protocol) - Port 161 and 162

• HTTPS (Hypertext Transfer Protocol Secure) - Port 443

It is important to note that these ports are not the only ones used in computer networking. There are many other ports used for specific applications and services. It is also important to ensure that any unused ports on a network are closed to prevent unauthorized access.