This page contains a description for numerous protocols seen in diverse communication networks. See HowToEdit for some tips about adding a missing protocol.
There are families of protocols, where the protocols relate to each other:
OPC: Protocols used in automation technology to access process data in a standardized way: OPC Data Access, OPC Alarm & Events, OPC Historical Data Access, OPC XML-DA, OPC Unified Architecture
WPANFamily: Protocols for wireless personal area networks, including IEEE 802.15.4, ZigBee, and 6LoWPAN
Identifier-Locator split protocols: HIP, LISP, SHIM6
LTE ProtocolFamily: Protocols for the 4G LTE, including S1AP,NAS,Diameter, GTPv2,GTPv1.GTP-U
A protocol can belong to more than one family.
RFC: Request For Comments: Not a protocol itself, but the place where a lot of the internet protocol standards can be found.
ANSI: American National Standards Institute: Some protocol specifications like FDDI. The ANSI accredited standards developer for information technology standards, including protocol standards is the InterNational Committee for Information Technology Standards, INCITS.
EPCglobal: Organization leading the development of industry-driven standards for the Electronic Product Code™ (EPC) to support the use of Radio Frequency Identification (RFID).
ETSI: European Telecommunications Standards Institute: Here you can find some protocol specifications.
ITU-T: International Telecommunication Union Telecommunication Standardization Sector (formerly CCITT): Specifies some of the protocols used in e.g. the VOIPProtocolFamily, as well as X.25, SS7, ASN.1, ...
Hardware related protocols
Ethernet: The most common link layer technology used today.
FibreChannel: fibre optical based link layer, used to connect storage devices
HSR: High-availability Seamless Redundancy: A protocol for network redundancy.
IEEE_802.15.4: Low-power wireless networking protocol intended for sensor networks.
ISDN: Integrated Services Digital Network (digital "telephone line")
MAC Addresses: Wireshark's list of Ethernet vendor codes and well-known MAC addresses
PRP: Parallel Redundancy Protocol: A protocol for network redundancy.
X.25: data packet delivery over serial lines, obsolete
ACN: ANSI BSR E1.17, Architecture for Control Networks.
AMQP: Advanced Message Queueing Protocol.
Bluetooth: Popular wireless protocols for mobile phone assessories.
C12.22: ANSI C12.22, communications protocol used for electric utility meter networks.
Cisco-IPSLA: Cisco IP SLA v1
CIGI: Common Image Generator Interface Protocol
CMP: Certificate Management Protocol.
DECT: Digital Enhanced Cordless Telecommunications. Popular cordless telephone interface.
DICOM: Digital Imaging and Communications in Medicine.
DVB-S2: DVB-S2 Baseband Frames
DVB-CI: DVB-CI (Common Interface).
FastCGI: FastCGI is a protocol for interfacing application programs with a web server.
FP Hint: Frame Protocol Hints, provides hints for dissecting FP traffic transmitted over the UMTS Iub interface.
HART-IP: Highway Addressable Remote Transducer over IP (HART-IP).
HDCP: High bandwidth Digital Content Protection (HDCP).
Gearman: Gearman provides a generic application framework to farm out work to other machines or processes that are better suited to do the work.
ISMACryp: Short for ISMA Encryption & Authentication.
IEEE C37.118: Synchrophasors for Power Systems
kNet: A network protocol for transmitting arbitrary application-specific messages between network hosts.
LDAP: The Lightweight Directory Access Protocol: The protocol accessing data from directory services like OpenLDAP, Microsoft Active Directory, Netscape Directory Server or Novell eDirectory.
META: TLV-based protocol for adding metadata to frames.
MS-LLTD: Link Layer Topology Discovery (LLTD) Protocol.
Netsync: The Monotone version control systems Netsync protocol.
OMRON-FINS: SCADA protocol called FINS made by OMRON for controlling industrial devices.
OpenFlow: Software Defined Networking southbound protocol
OpenVPN: OpenVPN Protocol provides the SSL/TLS connection with a reliable transport layer.
Oracle: Oracle has (apparently) several related protocols for sending SQL over the wire
PCP: Performance Co-Pilot protocol (a performance monitoring protocol)
SAMETIME: The Sametime Protocol (an instant message protocol)
SIMULCRYPT: A DVB / ETSI protocol used in IPTV / broadcast TV head-ends to handle multiple key management systems.
SML: A communication protocol for smart metering.
SSTP: Secure Socket Tunneling Protocol, a ssl based VPN protocol
STANAG_5066_SIS: Subnetwork Interface Sublayer of NATO STANAG 5066 data communication protocol for HF stack.
STANAG_5066_DTS: Data Transfer Sublayer of NATO STANAG 5066 protocol stack.
Tinkerforge: Tinkerforge Protocol.
Tor: The Tor Protocol.
UCP: Universal Computer Protocol.
UDT: UDP-based Data Transfer.
Ventrilo: The well-known VoIP program Ventrilo's own protocol.
VXI-11: The VXIbus Consortium's TCP/IP Instrument Protocol.
http://protocolinfo.org/wiki/List_of_protocols on protocolinfo.org (related to l7-filter)
http://en.wikipedia.org/wiki/Network_protocol Network protocols on wikipedia.org
http://www.protocols.com/pbook/ protocol directory at protocols.com
http://www.javvin.com/protocolsuite.html Protocol Dictionary at javvin.com
http://dir.yahoo.com/Computers_and_Internet/Communications_and_Networking/Protocols/ Protocols at Yahoo.com
http://www.rfc-editor.org/rfc-index.html Index of RFCs at the IANA
http://www.linkbit.com/support-decoder.html Linkbit online message parser
http://msdn.microsoft.com/en-us/library/jj712081.aspx Open Specifications for common Windows protocols at Microsoft.com