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This is an incomplete list of individual network protocols, categorized by their nearest OSI model layers.
Layer 1 protocols (Physical layer)
- ISDN Integrated Services Digital Network
- PDH Plesiochronous Digital Hierarchy
- RS-232, a serial line interface originally developed to connect modems and computer terminals
- SDH Synchronous Digital Hierarchy
- SONET Synchronous Optical NETworking
- Modem standards/ITU V-Series Protocols used to communicate between analog modems over voice telephone lines.
- Various Ethernet physical layers
Layer 2 protocols (Data link layer)
- ARCnet
- CDP Cisco Discovery Protocol
- DCAP Data Link Switching Client Access Protocol
- Dynamic Trunking Protocol
- Econet
- Ethernet
- FDDI Fiber Distributed Data Interface
- Frame Relay
- HDLC High Level Data Link Control
- IEEE 802.11
- IEEE 802.16
- LocalTalk
- L2F Layer 2 Forwarding Protocol
- L2TP Layer 2 Tunneling Protocol
- LAPD Link Access Procedures on the D channel
- LLDP Link Layer Discovery Protocol
- LLDP-MED Link Layer Discovery Protocol - Media Endpoint Discovery
- PPP Point-to-Point Protocol
- PPTP Point-to-Point Tunneling Protocol
- Q.710 Simplified Message Transfer Part
- SLIP Serial Line Internet Protocol (obsolete)
- StarLan
- STP Spanning Tree Protocol
- Token ring
- VTP VLAN Trunking Protocol
Layer 2+3 protocols
- ATM Asynchronous Transfer Mode
- Frame relay, a simplified version of X.25
- MPLS Multi-protocol label switching
- X.25
Layer 1+2+3 protocols
Layer 3 protocols (Network layer)
- ARP Address Resolution Protocol
- BGP Border Gateway Protocol
- CLNP Connectionless Networking Protocol
- EGP Exterior Gateway Protocol
- EIGRP Enhanced Interior Gateway Routing Protocol
- ICMP Internet Control Message Protocol
- IGMP Internet Group Management Protocol
- IGRP Interior Gataway Routing Protocol
- IPv4 Internet Protocol version 4
- IPv6 Internet Protocol version 6
- IPSec Internet Protocol Security
- IPX Internetwork Packet Exchange
- IS-IS Intermediate system to intermediate system
- MPLS Multiprotocol Label Switching
- OSPF Open Shortest Path First
- RARP Reverse Address Resolution Protocol
- RIP Routing Information Protocol
- SCCP Signalling Connection Control Part
Layer 3+4 protocols
Layer 4 protocols (Transport layer)
- AHAH Authentication Header over IP or IPSec
- ESPESP Encapsulated Security Payload over IP or IPSec
- GRE Generic Routing Encapsulation for tunneling
- IL Originally developed as transport layer for 9P
- SCTP Stream Control Transmission Protocol
- Sinec H1 for telecontrol
- SPX Sequenced Packet Exchange
- TCP Transmission Control Protocol
- UDP User Datagram Protocol
Layer 5 protocols (Session layer)
- 9P Distributed file system protocol developed originally as part of Plan 9
- NCP NetWare Core Protocol
- NFS Network File System
- SMB Server Message Block (aka CIFS Common Internet FileSystem)
Layer 7 protocols (Application layer)
- AFP, Apple Filing Protocol
- BACnet, Building Automation and Control Network protocol
- BitTorrent, a peer-to-peer file sharing protocol
- BOOTP, Bootstrap Protocol
- Diameter, an authentication, authorization and accounting protocol
- DICT, Dictionary protocol
- DNS, Domain Name System
- DHCP, Dynamic Host Configuration Protocol
- FTP, File Transfer Protocol
- Finger, which gives user profile information
- Gnutella, a peer-to-peer file-swapping protocol
- Gopher, a hierarchical hyperlinkable protocol
- HTTP, HyperText Transfer Protocol
- IMAP, Internet Message Access Protocol
- IRC, Internet Relay Chat protocol
- ISUP, ISDN User Part
- Jabber, an instant-messaging protocol
- LDAP Lightweight Directory Access Protocol
- MIME, Multipurpose Internet Mail Extensions
- MSNP, Microsoft Notification Protocol (used by Windows Live Messenger)
- MAP, Mobile Application Part
- NetBIOS, File Sharing and Name Resolution protocol - the basis of file sharing with Windows.
- NNTP, News Network Transfer Protocol
- NTP, Network Time Protocol
- NTCIP, National Transportation Communications for Intelligent Transportation System Protocol
- POP3 Post Office Protocol Version 3
- RADIUS, an authentication, authorization and accounting protocol
- Rlogin, a UNIX remote login protocol
- rsync, a file transfer protocol for backups, copying and mirroring
- RTP, Real-time Transport Protocol
- RTSP, Real-time Transport Streaming Protocol
- SSH, Secure Shell
- SISNAPI, Siebel Internet Session Network API
- SIP, Session Initiation Protocol, a signaling protocol
- SMTP, Simple Mail Transfer Protocol
- SNMP, Simple Network Management Protocol
- SOAP, Simple Object Access Protocol
- TUP, Telephone User Part
- Telnet, a remote terminal access protocol
- TCAP, Transaction Capabilities Application Part
- TFTP, Trivial File Transfer Protocol, a simple file transfer protocol
- WebDAV, Web Distributed Authoring and Versioning
and secure versions of the above (HTTPS, etc.)
Protocol description languages
- Abstract syntax notation one (ASN.1)
Other protocols
- Controller Area Network (CAN)
- Common Industrial Protocol (CIP)
- Digital Command Control (DCC)
- DSA Distributed Systems Architecture (Honeywell Bull)
- FIX protocol
- Gateway Discovery Protocol GDP is a Cisco protocol similar to IRDP
- ICMP Router Discovery Protocol Implementation of RFC 1256
- I²C
- List of automation protocols
- modbus
- SNA Systems Network Architecture (IBM)
- SOCKS
- STUN
External links
- Protocol Encapsulation Chart - A PDF file illustrating the relationship between common protocols and the OSI Reference Model.
- List of protocols – A very extensive list of protocols with examinations on many different types of protocols.
