Complete list of common TCP/UDP ports, protocols, and services
| Port | Protocol | Service | Description |
|---|
A network port is a virtual communication endpoint. Port numbers range from 0 to 65535 and help identify specific processes or network services on a device.
Ports 0-1023 are well-known ports assigned by IANA to common services like HTTP (80), HTTPS (443), FTP (21), SSH (22), and DNS (53).
TCP (Transmission Control Protocol) provides reliable, ordered delivery. UDP (User Datagram Protocol) is faster but unreliable. HTTP uses TCP; DNS uses both; streaming often uses UDP.