Basic TCP/IP and UDP Protocols Name and Ports
List of Common Network Port Numbers
| Application Layer | Transport Layer | |
| Protocol Name | TCP/IP | Port |
| HTTP (Hypertext Transfer Protocol) | TCP | 80 |
| HTTPS (Hypertext Transfer Protocol over SSL/TLS) | TCP | 443 |
| Telnet | TCP | 23 |
| SSH (Secure Shell) | TCP | 22 |
| FTP (File Transfer Protocol) | TCP | 20/21 |
| SFTP | TCP | 22 |
| IMAP (Internet Message Access Protocol ) | TCP | 143 |
| SMTP (Simple Mail Transfer Protocol) | TCP | 25 |
| POP3 (Post Office Protocol version 3) | TCP | 110 |
| DNS (Domain Name System) | TCP/UDP | 53 |
| TFTP (Trivial File Transfer Protocol) | UDP | 69 |
| DHCP (Dynamic Host Configuration Protocol) | UDP | 67/68 |
| NTP (Network Time Protocol) | UDP | 123 |
| NetBIOS | TCP/UDP | 137/138/139 |
| SNMP (Simple Network Management Protocol) | TCP/UDP | 161/162 |
| BGP (Border Gateway Protocol) | TCP | 179 |
| LDAPS (Lightweight Directory Access Protocol over TLS/SSL) | TCP/UDP | 636 |
| FTP over TLS/SSL | TCP | 989/990 |
| Remote Desktop Protocol | TCP/UDP | 3389 |
