List of network protocols :

List of network protocols :
This is an incomplete list of individual network protocols, categorized by their nearest OSI model layers.
1 Layer 1 protocols (Physical layer)
2 Layer 2 protocols (Data link layer)
3 Layer 2+3 protocols
4 Layer 3 protocols (Network layer)
5 Layer 3+4 protocols
6 Layer 4 protocols (Transport layer)
7 Layer 5 protocols (Session layer)
8 Layer 7 protocols (Application layer)
9 Protocol description languages
10 Other protocols 11 External links

LAYER 1 PROTOCOLS (PHYSICAL LAYER) ISDN
Integrated Services Digital Network Message Transfer Part Level
1 PDH Plesiochronous Digital Hierarchy
o T-carrier (T1, T3, etc.).
o E-carrier (E1, E3, etc.) 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 Message Transfer Part Level 2 PPP Point-to-Point Protocol PPTP Point-to-Point Tunneling Protocol 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 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 Message Transfer Part Level 3 MPLS Multiprotocol Label Switching OSPF Open Shortest Path First RARP Reverse Address Resolution Protocol RIP Routing Information Protocol

LAYER 3+4 PROTOCOLS Xerox Network Services
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 SCCP Signaling Connection and Control Part 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 Jabber, an instant-messaging protocol LDAP Lightweight Directory Access Protocol MIME, Multipurpose Internet Mail Extensions MSNP, Microsoft Notification Protocol (used by Windows Live Messenger) 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 Telnet, a remote terminal access protocol TFTP, Trivial File Transfer Protocol, a simple file transfer protocol WebDAV, Web Distributed Authoring and Versioning
and secure versions of the above (HTTPS, etc.)

OTHER PROTOCOLS
Controller Area Network (CAN)
Common Industrial Protocol (CIP)
Digital Command Control (DCC)
DSA Distributed Systems Architecture (Honeywell Bull) F
IX 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