List of network protocols (OSI model)

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This article is about network protocols organized by OSI model. For network protocols organized by TCP/IP model, see Internet Protocol Suite.

This is a list of network protocols, categorized by their nearest Open Systems Interconnection (OSI) model layers. This list is not exclusive to only the OSI protocol family. Many of these protocols are originally based on the Internet Protocol Suite (TCP/IP) and other models and they often do not fit neatly into OSI layers.


Layer 1 protocols (physical Layer)[edit]

Layer 2 protocols (Data Link Layer)[edit]

Layer +3 protocols[edit]

  • ARP Address Resolution Protocol
  • RARP Reverse Address Resolution Protocol
  • ATM Asynchronous Transfer Mode
  • Frame relay, a simplified version of X.25
  • IS-IS, Intermediate System - Intermediate System (OSI)
  • MPLS Multi-protocol label switching
  • SPB Shortest Path Bridging
  • X.25
  • MTP Message Transfer Part
  • NSP Network Service Part

Layer 3.5 protocols[edit]

  • HIP Host Identity Protocol

Layer 3+4 protocol suites[edit]

Layer 4 protocols (Transport Layer)[edit]

  • AH Authentication Header over IP or IPSec
  • 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
  • DCCP Datagram Congestion Control Protocol

Layer 5 protocols (Session Layer)[edit]

  • 9P Distributed file system protocol developed originally as part of Plan 9
  • NCP NetWare Core Protocol
  • NFS Network File System
  • SMB Server Message Block
  • SOCKS "SOCKetS"

Layer 6 protocols (Presentation Layer)[edit]

  • TLS Transport Layer Security

Layer 7 protocols (Application Layer)[edit]

  • ADC, A peer-to-peer file sharing protocol
  • AFP, Apple Filing Protocol
  • BACnet, Building Automation and Control Network protocol
  • BitTorrent, A peer-to-peer file sharing protocol
  • BGP Border Gateway Protocol
  • BOOTP, Bootstrap Protoc;
  • CAMEL, an SS7 protocol tool for the home operator
  • Diameter, an authentication, authorization and accounting protocol
  • DICOM includes a network protocol definition
  • DICT, Dictionary protocol
  • DNS, Domain Name System
  • DSM-CC Digital Storage Media Command and Control
  • DSNP, Distributed Social Networking Protocol
  • DHCP, Dynamic Host Configuration Protocol
  • ED2K, A peer-to-peer file sharing 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
  • HTTPS, Hypertext Transfer Protocol Secure
  • IMAP, Internet Message Access Protocol
  • IRC, Internet Relay Chat
  • ISUP, ISDN User Part
  • LDAP Lightweight Directory Access Protocol
  • MIME, Multipurpose Internet Mail Extensions
  • MSNP, Microsoft Notification Protocol (used by Windows Live Messenger)
  • MAP, Mobile Application Part
  • Mosh, Mobile Shell
  • NetBIOS, File Sharing and Name Resolution protocol - the basis of file sharing with Windows.
  • NNTP, Network News 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
  • RDP, Remote Desktop 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
  • SMB, Microsoft Server Message Block Protocol
  • STUN, Session Traversal Utilities for NAT
  • 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
  • XMPP, an instant-messaging protocol

Other protocols[edit]

Protocol description languages[edit]

See also[edit]

Further reading[edit]

External links[edit]