CompTIA Network+ | Microsoft MTA Networking: TCP/UDP Ports
Identify Commonly Used TCP/UDP Ports
Ports are what an application uses when communicating between a client and server computer.
Some common ports are:
| Protocol | Type | Number |
| FTP | TCP | 20,21 |
| SSH | TCP | 22 |
| TELNET | TCP | 23 |
| SMTP | TCP | 25 |
| DNS | TCP/UDP | 53 |
| DHCP | UDP | 67 |
| TFTP | UDP | 69 |
| HTTP | TCP | 80 |
| POP3 | TCP | 110 |
| NTP | TCP | 123 |
| IMAP4 | TCP | 143 |
| SNMP | UDP | 161 |
| HTTPS | TCP | 443 |
**Source by wikipedia**
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