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 (Physical Layer)[edit]

Layer 2 (Data Link Layer)[edit]

Network Topology[edit]

Layer 2.5[edit]

  • MPLS Multiprotocol Label Switching

Layer 3 (Network Layer)[edit]

  • 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 Gateway Routing Protocol
  • IPv4 Internet Protocol version 4
  • IPv6 Internet Protocol version 6
  • IPSec Internet Protocol Security
  • IPX Internetwork Packet Exchange
  • Routed-SMLT
  • SCCP Signalling Connection Control Part
  • AppleTalk DDP
  • GRE Generic Routing Encapsulation for tunneling
  • OSPF Open Shortest Path First
  • RIP Routing Information Protocol

Layer 3+4 (protocol suites)[edit]

Layer 4 (Transport Layer)[edit]

  • AH Authentication Header over IP or IPSec
  • ESP Encapsulating Security Payload 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 (Session Layer)[edit]

This layer, presentation Layer and application layer are combined in TCP/IP model.

  • BGP Border Gateway Protocol
  • 9P Distributed file system protocol developed originally as part of Plan 9
  • NetBIOS, File Sharing and Name Resolution protocol - the basis of file sharing with Windows.
  • NetBEUI, NetBIOS Enhanced User Interface
  • PPTP Point-to-Point Tunneling Protocol
  • NCP NetWare Core Protocol
  • NFS Network File System
  • SMB Server Message Block
  • This layer provides session management capabilities between hosts. For example, if some host needs a password verification for access and if credentials are provided then for that session password verification does not happen again. This layer can assist in synchronization, dialog control and critical operation management (e.g., an online bank transaction).

Layer 6 (Presentation Layer)[edit]

  • TLS Transport Layer Security

Layer 7 (Application Layer)[edit]

  • ADC, A peer-to-peer file sharing protocol
  • AFP, Apple Filing Protocol
  • AMQP, Advanced Message Queuing Protocol
  • BACnet, Building Automation and Control Network protocol
  • BitTorrent, A peer-to-peer file sharing protocol
  • BOOTP, Bootstrap Protocol
  • 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
  • Finger, which gives user profile information
  • FTP, File Transfer Protocol
  • 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
  • MQTT, Publish-Subscribe Messaging protocol
  • NNTP, Network News Transfer Protocol
  • NTP, Network Time Protocol
  • NTCIP, National Transportation Communications for Intelligent Transportation System Protocol
  • OpenADR Open Automated Demand Response; protocol to manage electricity consuming/controlling devices
  • 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
  • Simple Service Discovery Protocol, A discovery protocol employed by UPnP
  • 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
  • Universal Plug and Play
  • WebDAV, Web Distributed Authoring and Versioning
  • Extensible Messaging and Presence Protocol (XMPP)

Other protocols[edit]

Protocol description languages[edit]

See also[edit]

Further reading[edit]

External links[edit]