Here’s a comprehensive list of network protocols along with their commonly associated port numbers and what they stand for: Learn more…
Table of Contents
Application Layer Protocols
| Protocol | Port Number | Purpose |
|---|---|---|
| HTTP | 80 | Hypertext Transfer Protocol, used for web browsing |
| HTTPS | 443 | HTTP Secure, encrypted web browsing |
| FTP | 20, 21 | File Transfer Protocol, for transferring files |
| SFTP | 22 | Secure File Transfer Protocol, secure file transfers |
| SSH | 22 | Secure Shell, for secure remote login |
| Telnet | 23 | Remote login protocol (not secure) |
| SMTP | 25 | Simple Mail Transfer Protocol, for sending emails |
| POP3 | 110 | Post Office Protocol v3, for receiving emails |
| IMAP | 143 | Internet Message Access Protocol, for email access |
| DNS | 53 | Domain Name System, for resolving domain names |
| DHCP | 67, 68 | Dynamic Host Configuration Protocol, for IP allocation |
| TFTP | 69 | Trivial File Transfer Protocol, for simple file transfers |
| SNMP | 161, 162 | Simple Network Management Protocol, for network management |
| LDAP | 389 | Lightweight Directory Access Protocol, for directory services |
| LDAPS | 636 | Secure LDAP, encrypted directory services |
| RDP | 3389 | Remote Desktop Protocol, for remote desktop access |
| SIP | 5060, 5061 | Session Initiation Protocol, for VoIP signaling |
| RTP | Dynamic | Real-time Transport Protocol, for media streaming |
| MQTT | 1883, 8883 | Message Queuing Telemetry Transport, for IoT messaging |
Transport Layer Protocols
| Protocol | Port Number | Purpose |
|---|---|---|
| TCP | Dynamic | Transmission Control Protocol, reliable communication |
| UDP | Dynamic | User Datagram Protocol, for fast, connectionless communication |
Network Layer Protocols
| Protocol | Port Number | Purpose |
|---|---|---|
| ICMP | None | Internet Control Message Protocol, error reporting |
| IPsec | None | Internet Protocol Security, secure network traffic |
| IGMP | None | Internet Group Management Protocol, for multicast communication |
Other Notable Protocols
| Protocol | Port Number | Purpose |
|---|---|---|
| NTP | 123 | Network Time Protocol, for time synchronization |
| NetBIOS | 137, 138, 139 | Network Basic Input Output System, for file/printer sharing |
| SMB | 445 | Server Message Block, for file/printer sharing |
| BGP | 179 | Border Gateway Protocol, for routing between networks |
| MQTT over SSL/TLS | 8883 | Secure IoT messaging |
| Kerberos | 88 | Authentication protocol |
If you need a more specialized protocol list and definitions or additional details, let me know! and drop your comments. Learn more…
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