0..9 | A | B | C | D | E | F | G | H | I | L| M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

0..9

Abbreviation	Description	Sponsor Organization
1000Base-CX	Gigabit over 15 ohm coaxial cable up to 2 meter for Ethernet	IEEE
1000Base-LX	Gigabit over fiber with long wave laser up to 3 kilometers for Ethernet	IEEE
1000Base-SX	Gigabit over fiber with short wave laser up to 55 meters for Ethernet	IEEE
1000Base-T	Gigabit over twisted pair for Ethernet	IEEE
1000Base-X	Gigabit over multiple media for Ethernet	IEEE
100Base-T	1 Mbps over twisted pair for Ethernet	IEEE
100BaseX	1 Mbps for Ethernet for multiple media: FX: Fiber	IEEE
10Base2	1 Mbps over thin coaxial cable	IEEE
10Base5	1 Mbps over 5 ohm thick coaxial cable for Ethernet	IEEE
10Base-F	1 Mbps over Fiber for Ethernet	IEEE
10Base-T	1 Mbps over twisted pair for Ethernet	IEEE
10Broad36	1 Mbps over coaxial cable up to 36 meters with Frequency Division Multiplexing	IEEE
1Base5	1 Mbps over unshielded twisted pair for Ethernet	IEEE
802.1	IEEE LAN protocol family	IEEE
802.12	1 VG-Any LAN standard	IEEE
802.2	Logical Link Control protocol for Ethernet	IEEE
802.3	Data Link Layer (CSMA/CD)	IEEE
802.5	Token-passing access on ring topology using unshielded twisted pair	IEEE
802.6	Metropolitan Area Network (MAN) layer 2 standard	IEEE
802.11a	Wireless LAN standard with speed up to 54 Mbps	IEEE
802.11b	Wireless LAN standard with speed up to 11 Mbps	IEEE
802.11g	Wireless LAN standard with speed up to 54 Mbps	IEEE
802.1D	Spanning Tree Protocol	IEEE
802.1Q	Virtual LAN (VLAN) Switching protocol	IEEE
802.1q	Virtual Bridged LAN	IEEE
802.3 CSMA/CD	Carrier Sense Multi-Access with Collision Control	IEEE
802.3ae	1 Gigabit Ethernet standard	IEEE
802.3z	Gigabit Ethernet over fiber standard	IEEE

A

Abbreviation	Description	Sponsor Organization
AARP	AppleTalk Address Resolution Protocol	Apple
ABP	AppleTalk Broadcast Protocol	Apple
Address Mask	A bit mask used to select bits from an Intranet provider (IP) address for subnet addressing. The mask is 32 bits long and selects the network portion of the IP address and one or more bits of the local portion.
ADSL		ANSI
ADSL Lite	Universal ADSL and splitterless ADSL; also known as G.lite	ANSI
ADSP	AppleTalk Data Stream Protocol	Apple
AEP	AppleTalk Echo Protocol	Apple
AFP	AppleTalk Filing Protocol	Apple
AH	Authentication Header in IPSEC suite	IETF
ANSI	"American National Standards Institute. A standards organization that sets standards for the U.S. computer industry. For instance, ANSI participates in defining network protocol standards."
ARP	Address Resolution Protocol. The Transmission Control Protocol/Internet Protocol (TCP/IP) used to dynamically bind a high level IP address to a low-level physical hardware address.	IETF
ASCII	American Standard Code for Information Interchange. The American Standard Code for Information Interchange 7-bit character set. It consists of the first 128 (0-127) characters of the ANSI character set (and most other 8-bit character sets). The ASCII character set is the most universal character-coding set.
ASP	AppleTalk Session Protocol	Apple
ATCP	AppleTalk Control Protocol	Apple
ATIP	AppleTalk Tunneling Through IP	IETF
ATM	Asynchronous Transfer Mode with fixed 53-byte cells to support voice. Data and video support a minimum rate of 1.544 Mbps (DS1)	ETSI & ECSA
ATP	AppleTalk Transaction Protocol	Apple
AURP	AppleTalk Update-based Routing Protocol	Apple

B

Abbreviation	Description	Sponsor Organization
BACP	Bandwidth Allocation Control Protocol (PPP suite)	IETF
BAP	Bandwidth Allocation Protocol (PPP suite)	IETF
BCAST	Broadcast Protocol	Novell
BCC	Broadcast Call Control	Novell
BCP	Bridging Control Protocol (PPP suite)	IETF
BGP	Border Gateway Protocol	IETF
BGP-4	Border Gateway Protocol version 4	IETF
BGMP	Border Gateway Multicast Protocol	IETF
BMP (Burst)	Burst Mode Protocol	Novell
Bootstrap Protocol	Bootstrap Protocol	IETF
BPDU	Bridge Protocol Data Unit	IETF
BRE	"Bridge Relay Encapsulation, proprietary Ascom Timeplex protocol that extends bridging across WAN links by means of encapsulation (Frame Relay). "	IETF

C

Abbreviation	Description	Sponsor Organization
CCP	Compression Control Protocol	IETF
CDP	Cisco Discovery Protocol	Cisco
CHAP	Challenge Handshake Authentication Protocol (PPP suite)	IETF
CHAP	Challenge Handshake Authentication Protocol PPP Authentication	IETF
CIF	Cells in Frames (ATM over LAN)	ETSI & ECSA
CLNP	Connectionless Network Protocol	ISO/OSI
COPS	Common Open Policy Service	IETF
COTS	Connection-mode Transport Service	ISO/OSI
CR-LDP	Constraint-based Label Distribution Protocol	IETF

D

Abbreviation	Description	Sponsor Organization
DCAP	Data Link Switching Client Access Protocol	IETF
DCP	Data Compression Protocol over Frame Relay	IETF
DCPCP	DCP Control Protocol	IETF
DDP	Datagram Delivery Protocol (AppleTalk)	Apple
DECnet	Digital Equipment Corporation protocols developed to communicate between DEC minicomputers.	DEC
DHCP	Dynamic Host Configuration Protocol	IETF
DIAG	Diagnostic Responder protocol	Novell
DISL	Dynamic Inter-Switch Link Protocol	Cisco
DLSw	Data Link Switching	IBM
DNS	Domain Name System (Service)	IETF
DRARP	Dynamic Reverse Address Resolution Protocol	IETF
DRIP	Duplicate Ring Protocol	Cisco
DS	Digital Signal for voice channel of 64 Kbps	Bell Labs
DS1/T1	Digital Signal for voice channel of 1.544 Mbps supports 24 DS; A standard for North America	Bell Labs
DS3/T3	Digital Signal for voice channel of 44.736 Mbps supports 28 DS1/T1; a standard for North America	Bell Labs
DSMCC	Digital Storage Media Command and Control (Audio Visual over ATM)
DVB	Digital Video Broadcasting
DVMRP	Distance Vector Multicast Routing Protocol	IETF

E

Abbreviation	Description	Sponsor Organization
E1	Digital Signal for voice channel of 2.48 Mbps supports 3 DS; a standard for European and some other international countries	ITU-T
E3	Digital Signal for voice channel of 34.368 Mbps supports 16 E1; a standard for European and some other international counties	ITU-T
ECHO	Echo Protocol	IETF
ECP	Encryption Control Protocol (PPP suite)	IETF
EGP	Exterior Gateway Protocol	IETF
EIGRP	Enhanced Interior Gateway Routing Protocol	Cisco
ES-IS	End system to Intermediate System protocol	ISO
ESP	Encapsulating Security payload	IETF
Ethernet	LAN protocol synonymous with IEEE 82.3 standard	IEEE
Ethernet II	Ethernet II	IEEE

F

Abbreviation	Description	Sponsor Organization
FANAP	Flow Attribute Notification Protocol
FDDI	Fiber Distributed Data Interface for 1 Mbps optical LAN	ANSI
Fibre Channel	protocol to provide fast data transfer between computers with a rate up to 1 Gbps over coaxial cable or fiber	ANSI
FID	Format Identifier 1 and 2	IBM
Finger	User Information Protocol (RFC 742)	IETF
Frame Relay	A standard with variable size of packet length up to 496 Bytes to support inter-network communications at layer 2	ITU-T
FTP	File Transfer Protocol (RFC 172)	IETF
FTP Cmd or Reply	FTP Cmd or Reply	IETF
FUNI	Frame-based UNI (User Network Interface)	IETF

G

Abbreviation	Description	Sponsor Organization
G.711	Pulse code modulation (PCM) of voice frequencies	ITU
G.723	Extensions adaptive differential pulse code modulation	ITU
G.728	Coding of speech at 16 kbit/s using low-delay code excited linear prediction	ITU
G.729	Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear-prediction	ITU
GMM	GPRS Mobility Management	ITU-T
GMRP	82.1 GARP Multicast Registration Protocol	IEEE
GSM	GPRS Session Management	ITU-T
GSMP	General Switch Management Protocol (IP Switching)	ITU-T
GTP	GPRS Tuneling Protocol	ITU-T
GVRP	GARP VLAN Registration protocol	IEEE

H

Abbreviation	Description	Sponsor Organization
HDLC	"High Level Data Link Control protocol developed by ISO, based on pioneering work by IBM on SDLC. "	ISO
HPR-APPN	"High Performance Routing Advanced Peer to Peer Network, IBM network architecture for dynamic routing across arbitrary network topologies."	IBM
HSRP	Hot Standby Router Protocol	Cisco
HTML	Hypertext Markup Language	IETF
HTTP	HyperText Transfer Protocol (W3C/RFC 1945)	IETF
HTTPS	Hypertext Transfer Protocol Secure (TCP/IP)	IETF

I

Abbreviation	Description	Sponsor Organization
ICMP	Internet Control Messages Protocol	IETF
ICMPv6	Revision of ICMP for IPv6	IETF
IDP	Internet Datagram Protocol (XNS) IFMP Ipsilon Flow Management Protocol (IP Switching)	IETF
"IGMP v1, v2, v3"	"Internet Group Management Protocol version 1, version 2, and version 3"	IETF
IGRP	Interior Gateway Routing Protocol	Cisco
IISP	Interim Interswitch Signaling Protocol (ATM Signaling)	ETSI & ECSA
ILMI	"Interim Local Management Interface, bi-direction exchange of management information between UMEs. "	IETF
IMAP	Interactive Mail Access Protocol	IETF
IMT-2	3G wireless communication protocol same as CDMA2	ITU-T
InARP	Inverse Address Resolution Protocol	IETF
IP	Internet Protocol for packet addressing and routing in network (LAN and WAN)	DARPA/IETF
IP NetBIOS Datagram Service	IP NetBIOS Datagram Service	IETF
IPCP	"IP Control Protocol, responsible for configuring the IP parameters on both ends of the PPP link. "	IETF
IPHC	IP Header Compression	IETF
IPSec	IP Security Protocol	IETF
IPv4	Internet Protocol version 4	DARPA/IETF
IPv6	Internet Protocol version 6	IETF
IPv6CP	"IPv6 PPP Control Protocol, responsible for configuring, enabling and disabling the IPv6 protocol modules on both ends of a PPP link."	IETF
IPX	"Internetwork Packet Exchange, Novell's implementation of the Xerox Internet Datagram Protocol (IDP)."	Novell
IPXCP	"IPX PPP Control Protocol, choose and configure the IPX network-layer protocol over PPP."	Novell
ISAKMP	Internet Security Association and Key Management Protocol	IETF
iSCSI	Internet Small Computer Systems Interface for fast storage data transfer over IP	IETF
ISDN	"Integrated Services Digital Network for a circuit switched network to support access of voice, data and vedio"	ITU-T
IS-IS (ISO 1589)	"IS-IS (ISO 1589) - Intermediate System to Intermediate System, exchange of configuration and routing information to facilitate the operation of the routing and relaying functions of the network layer."	ISO
ISL	Inter-Switch Link Protocol	Cisco
ISO protocols	International Standards Organization protocols defined by IEEE; complete seven-layer protocol conforming to the OSI networking model.	ISO
ISO-IP	"ISO Internetworking Protocol, includes built-in error signaling to aid in routing management."	ISO
ISO-SP	"ISO Session Protocol, specifies procedures for a single protocol for the transfer of data and control information from one session entity to a peer session entity."	ISO
ISO-TP (ISO 873)	ISO Transport Protocol	ISO
ISUP	"ISDN User Part of SS7, defines protocol and procedures used to setup, manage and release trunk circuits that carry voice and data calls over the public switched telephone network."	Bell Labs

L

Abbreviation	Description	Sponsor Organization
L2F	"Layer 2 Forwarding protocol, permits the tunneling of the link layer of higher layer protocols (PPP suite)."	Cisco
L2TP	"Layer 2 Tunneling Protocol, used for integrating multi-protocol dial-up services into existing ISP POP."	IETF
LANE-UNI	LAN Emulation - User to Network Interface	ITU
LANE-NNI	LAN Emulation - Network to Network Interface	ITU
LAPB	"Link Access Protocol, Balanced, derived from HDLC and used to carry X.25 packets."	CCITT
LAPD	"Link Access Protocol, Channel D, layer 2 protocol defined in CCITT."	CCITT
LAPF	"Link Access Procedure F (Frame Relay), modified LAPD standard for Frame Relay."	CCITT
LCP	"Link Control Protocol, establishes, configures and tests the data link connection (PPP suite)."	IETF
LDAP	Lightweight Directory Access Protocol	IETF
LDP	Label Distribution Protocol	IETF
LLC	"Logical Link Control protocol (IEEE 82.2), provides a link mechanism for upper layer protocols."	IEEE
LQR	"Link Quality Report, specifies the mechanism for link quality monitoring with PPP."	IEEE

M

Abbreviation	Description	Sponsor Organization
M2UA	Protocol for backhauling of SS7 MTP2-User signaling messages over IP using Stream Control Transmission Protocol (SCTP)	Bell Labs
M3UA	Protocol to support transport of SS7 MTP3-User signaling over IP using Stream Control Transmission Protocol (SCTP)	Bell Labs
MACIP	Mac Internet Protocol	Apple
MAPOS	Multiple Access Protocol over SONET / SDH	ETSI & ECSA
MARS	Multicast Address Resolution Server	IETF
MEGACO	Media Gateway Control as defined by H.248	IETF & ITU-T
MGCP	Media Gateway Control Protocol for VOIP	IETF
MLP	"Multilink Procedure, added upper sublayer of the LAPB, operating between the packet layer and a multiplicity of single data link protocol functions (SLPs) in the data link layer (X.25)."	IETF
MOUNT	Protocol used to initiate client access to a server supporting NFS.	IETF
MPEG	Motion Pictures Experts Group for data compression of motion video	ISO
MPLS	"Multi-Protocol Label Switching to support IP services over ATM and Frame Relay networks through set of procedures for augmenting network layer packets with ""label stacks"", thereby turning them into labeled packets. "	IETF
MPOA	"Multi Protocol Over ATM, deals with efficient transfer of inner-subnet unicast data in a LAN emulation environment."	"ITU, ETSI & ECSA"
MPPC	Microsoft Point-to-Point Compression Protocol	Microsoft
MSRAP	Microsoft Remote Administration Protocol	Microsoft
MSRPC	Microsoft Remote Procedure Call	Microsoft
MTP-2	"Message Transfer Part, Level 2, signaling link to provides reliable transfer of signaling messages between two directly connected signaling points (SS7)."	Bell Labs
MTP-3	"Message Transfer Part, Level 3, connects Q.SAAL to the users (SS7 suite)."	Bell Labs

N

Abbreviation	Description	Sponsor Organization
NBFCP	"PPP NetBIOS Frames Control Protocol, network control protocol responsible for establishing and configuring the NBF protocol over PPP."	IETF
NBMA	"Non-Broadcast, Multi-Access."	Novell
NBP	"AppleTalk Name Binding Protocol, manages the use of names on AppleTalk networks."	Apple
NCP	"Novell NetWare Core Protocol, manages access to the primary NetWare server resources."	Novell
NDS	"NetWare Directory Services (Novell), globally distributed network database that replaces the bindery used in previous versions of NetWare."	Novell
NetBEUI	NetBIOS Extended User Interface	IBM
NetBIOS	Network Basic Input/Output System	IBM
NFS	"Sun Network File System, file sharing application for the Sun protocol suite."	Sun
NHDR	"Network Layer Header, begins the frame used by RTP nodes."	Novell
NHRP	NBMA Next Hop Resolution Protocol.	Novell
NLSP	NetWare Link Services Protocol	Novell
NNTP	Network News Transfer Protocol	IETF
NTP	"Network Time Protocol, time synchronization system for computer clocks through the Internet network ."	DARPA

O

Abbreviation	Description	Sponsor Organization
OC1	SONET/SDH transmission with rate of 51.84 Mbps	ANSI/ITU-T
OC12	SONET/SDH transmission with rate of 622.8 Mbps	ANSI/ITU-T
OC18	SONET/SDH transmission with rate of 933.12 Mbps	ANSI/ITU-T
OC192	SONET/SDH transmission with rate of 9.953 Gbps	ANSI/ITU-T
OC24	SONET/SDH transmission with rate of 1.244 Gbps	ANSI/ITU-T
OC3	SONET/SDH transmission with rate of 155.52 Mbps	ANSI/ITU-T
OC36	SONET/SDH transmission with rate of 1.866 Gbps	ANSI/ITU-T
OC48	SONET/SDH transmission with rate of 2.488 Gbps	ANSI/ITU-T
OC768	SONET/SDH transmission with rate of 39.812 Gbps	ANSI/ITU-T
OC9	SONET/SDH transmission with rate of 466.56 Mbps	ANSI/ITU-T
OC96	SONET/SDH transmission with rate of 4.976 Gbps	ANSI/ITU-T
OSI Model	Open Systems Interconnection network reference model	ISO
OSINLCP	"OSI Network Layer Control Protocol, responsible for configuring,enabling and disabling the OSI protocol modules on both ends of the PPP link."	ISO
OSPF	"Open Shortest Path First, link-state routing protocol used for routing IP."	IETF

P

Abbreviation	Description	Sponsor Organization
PAP	"Password Authentication Protocol, provides a simple method for the peer to establish its identity using a 2-way handshake."	IETF
PAP	"Printer Access Protocol, manages the virtual connection to printers and other servers (AppleTalk)."	Apple
PEP	"Packet Exchange Protocol, provides a semi-reliable packet delivery service that orients towards single-packet exchanges."	Xerox
PIM	Protocol Independent Multicast	IETF
PIM-DM	Protocol Indelendent Multicast - Dense Mode	IETF
PIM-SM	Protocol Independent Multicast-Sparse Mode	IETF
PMAP	"Port Mapper protocol, manages the allocation of transport layer ports to network server applications (Sun)."	Sun
PNNI	"Private Network-to-Network Interface, hierarchical, dynamic link-state routing protocol (ATM)."	ETSI & ECSA
POP	"Post Office Protocol, a protocol that allows single user machines to download email from a server. "	IETF
POP3	"Post Office Protocol version 3, permits workstations to dynamically access a maildrop on a server host (TCP/IP)."	IETF
POST	"Power-On Self-Test. Test of internal circuitry, memory, and installed hardware that a computer performs on itself when turned on."
Protocol	"Rules for communicating, particularly for the format and transmission of data. Most protocols are transparent. For instance, a protocol was employed to transfer this information to your computer"
PP	"ISO Presentation Protocol, performs context negotiation and management between open systems."	ISO
PPP	"Point to Point Protocol. An implementation of the TCP/IP protocol for use over serial lines (modems). Allows direct access to the Internet over a modem. Compare with SLIP, another such protocol. See Layer 2 of the OSI model"	IETF
PPP Multilink	"Multilink Point-to-Point Protocol, permits a system to indicate to its peer that it is capable of combining multiple physical links into a ""bundle""."	IETF
PPP-BPDU	"PPP Bridge Protocol Data Unit, used to connect remote bridges."	IETF
PPPoE	PPP over Ethernet	IETF
PPTP	"PPTP - Point-to-Point Tunneling Protocol, allows PPP to be channeled through an IP network."	IETF

Q

Abbreviation	Description	Sponsor Organization
Q.2931	Signaling standard for ATM to support Switched Virtual Connections. This is the signaling standard for ISDN.	ETSI & ECSA
Q.85	Usage of cause and location	ITU
Q.931	ISDN user-network interface layer 3 for Basic Call Control	ITU
Q.932	Digital subscriber signaling system No. 1	ITU
Q.952	Stage 3 description for call offering supplementary services using DSS 1 - Diversion supplementary services	ITU
Q.953	Call waiting/Call hold/Completion of Calls to Busy Subscribers (CCBS)/Terminal Portability (TP)/Call Completion on No Reply (CCNR)	ITU
Q.955	Closed user group/Multi-level precedence and preemption (MLPP)	ITU
Q.956	Advice of charge/Reverse charging	ITU
Q.957	User-to-User Signaling (UUS)	ITU
QLLC	"Qualified Logical Link Control protocol, transfers IBM SNA data over an X.25 network."	IBM

Q

Abbreviation	Description	Sponsor Organization
RADIUS	Remote Authentication Dial-in User Service for user authentication and accounting	IETF
RANAP	Radio Access Network Application Part is the Radio Network Layer signaling protocol
RARP	Reverse Address Resolution Protocol	IETF
RDP	Reliable Data Protocol	IETF
Repeater	"A device used in networks to extend cabling distances by amplifying or regenerating signals. Used to join lengths of network cables or to split a network cable into multiple segments. You might also find repeaters useful if you want to use different types of cable in your network. For example, you could connect an Ethernet network with 10Base-T cable to one on a thick cable. "
RFC	"Request for Comments, a series of notes about the Internet, started in 1969 (when the Internet was the ARPANET). The notes discuss many aspects of computing and computer communication focusing in networking protocols, procedures, programs, and concepts, but also including meeting notes, opinion, and sometimes humor. The specification documents of the Internet protocol suite, as defined by the Internet Engineering Task Force (IETF) and its steering group (the IESG), are published as RFCs. Many of the TCP/IP protocols and PPP protocols are defined by rfc's."	IETF
RIP	Routing Information Protocol	IETF
RIP2	Routing Information Protocol version 2	IETF
RIPng	Routing Information Protocol for IPv6	IETF
RIPX	"Routing Information Protocol, used to collect, maintain and exchange correct routing information among gateways within the Internet"	Novell
RGB	"Red, Green, Blue. A standard way of specifying colors on a computer monitor. Stands for the three (additive) primary colors; that is, the primary colors generated when light is combined to produce the color. Red, yellow, and blue are the primary colors when ink is blended and put onto white paper. CYMB (Cyan, yellow, magenta, black) is the color model used for printing"
RLOGIN	"Remote Login, allows UNIX users of one machine to connect to other UNIX systems across the Internet and interact as if their terminals are directly connected to the machines (TCP/IP)."	IETF
RLP	Radio Link Protocol	IEEE
RM Cells	Rate Management cells (ATM cells).	ETSI & ECSA
RMON	Remote Monitoring MIBS - belong to the SNMP protocol family	IETF
Router	Hardware and software that routes data between similar or dissimilar networks on the protocol level. Routers can support more than one protocol. Routers can actively direct messages between separate networks. They make decisions about which path the network traffic follows. Each network connected by the router has a unique identity with its own Internet address.
RPC	"Remote Procedure Call protocol, activates a function on a remote station and retrieves the result"	Sun
RPC Mount Procedures	RPC Mount Procedures	Sun
RPC NFS Procedures	RPC NFS Procedures	Sun
RPC-PMP	RPC Port Mapper Procedures	Sun
RSH/RCMD	Remote Shell/Remote Command	IETF
RSVP	"Resource ReSerVation Protocol, designed for an integrated services Internet."	IETF
RSVP-TE	Resource Reservation Protocol: Traffic Extension	IETF
RTCP	Real-time Transport Control Protocol	IETF
RTMP	"Routing Table Maintenance Protocol, manages routing information for AppleTalk networks."	IETF
RTP	Real-time Transport Protocol	IETF
RTSP	Real Time Streaming Protocol	IETF
RUDP	Reliable UDP	IETF

S

Abbreviation	Description	Sponsor Organization
SAP	"Novell's Netware Service Advertising Protocol, provides information about what servers are available on the network."	Novell
SCCP	"Signaling Connection Control Part, offers enhancements to MTP level 3 to provide connectionless and connection-oriented network services, as well as to address translation capabilities (SS7)."	Bell Labs
SCCP	Skinny Client Control Protocol	Cisco
SCSI	"Small Computer System Interface. A fast port used to connect computers with hard drives and other peripherals. Pronounced ""scuzzy."" SCSI devices are ""daisy chained"" (connected in a series each with a different ID). Thus you can attach multiple SCSI devices to a single SCSI controller card as long as they have different SCSI ID's. "	ANSI
SCSP	Routine protocol in the TCP/IP family.	IETF
SCTP	Stream Control Transmission Protocol	IETF
SDCP	"PPP Serial Data Control Protocol, responsible for configuring, enabling and disabling the SDTP modules on both ends of the point-to-point link."	IETF
SDH	"Synchronous Data Link Hierarchy, a European standard for data transmission over fiber equivalent to SONET"	ITU-T
SDLC	"Synchronous Data Link Control protocol, developed by IBM to be used as the layer 2 of the SNA hierarchical network."	IBM
SDP	Session Description Protocol
SER	"Serialization packet, ensures that a single version of NetWare is not being loaded on multiple servers."	Novell
Serial Interface	"An interface between a computer and a serial device, such as a printer or modem, by which the computer sends single bits of information to the device, one after the other."
Serial Port	"A port that transmits data a bit at a time, used for modems, mice, certain printers and communication devices"
SGCP	Simple Gateway Control Protocol for VOIP+B147	Cisco & Telcordia
SIP	"SMDS Interface Protocol, three-level protocol that controls access to the network."	Bell Labs
SIP (VOIP)	Session Initiation Protocol	IETF
SLP	Service Location Protocol	IETF
SLIP	"Line Internet Protocol. An implementation of the TCP/IP protocol used over serial lines (modems). Allows direct access to the Internet over a modem. Compare with PPP, another such protocol. "
SMB	"Server Message Block, Microsoft presentation layer protocol providing file and print sharing functions for LAN Manager, Banyan VINES and other networking operating systems."	Microsoft
SMDS	Switched Multi-Megabit Data Service for public network service for LAN-to-LAN interconnection with a bandwidth up to 45 Mbps (T3)	IEEE
SMPP	Short Message Peer to Peer
SMS	Short Message Service (UMTS)
SMTP	"Simple Mail Transfer Protocol, mail service modeled on the FTP file transfer service."	IETF
SNA	"Systems Network Architecture, introduced by IBM to provide a framework for joining together many mutually incompatible IBM products for distributed processing."	IBM
SNACP	"SNA PPP Control Protocol, responsible for configuring, enabling and disabling SNA on both ends of the point-point link (PPP)."	IBM
SNAP	Subnetwork Access Protocol for LAN logical link control frame	IEEE
SNI	"Subscriber Network Interface such as DS, DS1/T1, DS3/T3, E1, E3 to access to the SMDS network"	Bell Labs
SNMP	"Simple Network Management Protocol: A standard protocol used to monitor network activity on ""agent"" nodes from management stations. "	IETF
SNMPv1	SNMP version 1	IETF
SNMPv2	SNMP version 2	IETF
SNMPv3	SNMP version 3
SNMP OID	SNMP Object Identifiers	IETF
SNMP RMON	SNMP Remote Network Monitoring	IETF
SNMP RMON2	SNMP Remote Network Monitoring version 2	IETF
SNMP SMI	SNMP Structure of Management Information (RFC 1155)	IETF
SNTP	Simple Network Time Protocol (RFC 1769)	IETF
SOCKS	"A circuit level security technology supports multiple means of authentication, negotiation between client and server over a virtual circuit"	IETF
SONET	"Synchronous Optical Network, a North America standard for data transmission over fiber from 51.84 Mbps to 39.812 Gbps"	ANSI
SPANS	"Simple Protocol for ATM Network Signaling, developed by FORE Systems for use in ATM networks."	FORE
SPP	Sequenced Packet Protocol	Xerox
SPX	"Sequential Packet Exchange, Novell's version of Xerox SPP. It is a transport layer protocol providing a packet delivery service for third party applications."	Novell
SRB	"Source Routing Bridging, proprietary header of Bay Networks which passes Token Ring information over WAN lines."	BAY Networks
SRP	Spatial Reuse Protocol.
SS7	"Signaling System 7, a common channel signaling system."	Bell Labs
STP	"Spanning Tree Protocol, prevents the formation of logical looping in the network (DECnet)."	DEC

T

Abbreviation	Description	Sponsor Organization
TALI	Transport Adapter Layer Interface
TARP	TID Address Resolution Protocol	ISO/OSI
TCAP	"Transaction Capabilities Application Part, enables the deployment of advanced intelligent network services by supporting non-circuit related information exchange between signaling points using the SCCP connectionless service (SS7)."	Bell Labs
TCP/IP	"Transmission Control Protocol/Internet Protocol, TCP/IP allows a process on one machine to send data to a process on another machine using the IP protocol stack. TCP can be used as a full duplex or one way simplex connection. See Layer 4 of the OSI Model"	DARPA/IETF
TDP	"Tag Distribution Protocol, a two party protocol that runs over a connection oriented transport layer with guaranteed sequential delivery."	IETF
TELNET	Network Virtual Terminal protocol for terminal emulation (RFC 318)	IETF
TFTP	"Trivial File Transfer Protocol, supports file writing and reading (RFC 783)."	IETF
THDR	"Transport Layer Header, used by RTP endpoints to provide correct processing of the packet (SNA)."	IBM
Thick Ethernet	"Ethernet cabling which uses half-inch diameter coaxial cable to connect computers. The connector, DB-9, physically resembles a serial port. "
Thin Ethernet	Ethernet cabling which uses thin coaxial cable to connect computers. This type of cable uses a T-shaped connector
Timeplex (BRE2)	"Bridge Relay Encapsulation, proprietary Ascom Timeplex protocol that extends bridging across WAN links by means of encapsulation (Frame Relay)."	IETF
Token Ring	A networking hardware system developed by IBM. Constructed as a ring of daisy-chained nodes. Each node passes a control message (token) around the ring. Whichever node has the token can send a message	IEEE
Topology	The physical layout of network cabling
Twisted Pair Wire	"Commonly used for telephone and network wiring. Twisted pair wire consists of two pairs of wires, one for transmitting and one for receiving data. The wires in each pair are twisted together to reduce electrical induction between them. 10Base-T Ethernet cable is and example of twisted pair wire."

U

Abbreviation	Description	Sponsor Organization
UDP	"User Datagram Protocol to provide layer 4 connectionless without acknowledgement delivery of packets to end users, as part of the IP suite"	DARPA/IETF
UMTS	Universal Mobile Telecommunication System for next generation of GSM	ETSI
UNI	"User Network Interface, an interface point between ATM end users and a private ATM switch, or between a private ATM switch and the public carrier ATM network."	ITU

V

Abbreviation	Description	Sponsor Organization
V.DOT terms:	A series of modem communications standards.
V.32:	Supports standard 9600 bps.
V.32bis:	Supports 14.4K bps.
V.42:	Supports error detection and data compression.
V.42bis:	Supports a different data compression scheme than V.42.
V.34:	Supports 28.8K bps
Van Jacobson	Compressed TCP protocol which improves the TCP/IP performance over low speed serial links.	IETF
VCI	Virtual Channel Identifier.	IETF
VIP	VLAN Trunk Protocol	Cisco
VIVID MPOA	Proprietary protocol of Newbridge which provides bridged LAN Emulation and routed LAN Emulation functionality.	Newbridge
VLAN	"Virtual LAN supported by IEEE 82.1D, 82.1G, 82.1Q and other protocols"
VOIP	"Voice over IP - transmit voice over IP packet network - supported by protocols such as H.323, SIP, MGCP, MEGACO etc."
VPI	Virtual Path Identifier	IETF
VRRP	Virtual Router Redundancy Protocol (RFC 2338)	IETF

W

Abbreviation	Description	Sponsor Organization
WAE	Wireless Application Environment	IEEE
WAIS	Wide Area Information Server. An information retrieval system used on the Internet that features text search facilities to find documents.
WAN	"Wide Area Network. A network linking computers, terminals, and other equipment over a large geographic area."
WAP	Wireless Application Protocol	IEEE
WCCP	Web Cache Communication Protocol	IETF/Cisco
WDOG	"Watchdog protocol, provides constant validation of active workstation connections and notifies the NetWare operating system when a connection may be terminated as a result of lengthy periods without communication."	Novell
Wellfleet BOFL	"Wellfleet Breath of Life, used as a line sensing protocol."	IEEE
Wellfleet SRB	"Source Routing Bridging, proprietary header of Bay Networks which passes Token Ring information over WAN lines."	BAY Networks
WiFi	Wireless Fidelity - Nick name for 82.11b for wireless LAN with bandwidth up to 11 Mbps	IEEE
WINS	Windows Internet Name Service	Microsoft
WLAN	"Wireless Lan supported by IEEE 82.11a, 82.11b, 82.11g and other protocols"
WML	Wireless Markup Language for WAP related browser	IEEE
WSP	Wireless Session Protocol	IEEE
WTLS	Wireless Transport Layer Security	IEEE
WTP	Wireless Transaction Protocol	IEEE

X

Abbreviation	Description	Sponsor Organization
X.25	"A standard provides the user interface into the original switched network with a fixed packet length of 128 Byte, 256 Byte, 512 Byte or 124 Byte"	ITU-T
X.75	Signaling system which is used to connect packet switched networks (such as X.25) on international circuits.	ITU-T
XNS	"Xerox Network System protocols, provide routing capability and support for both sequenced and connectionless packet delivery."	Xerox
XNS	Xerox Network Protocol	Xerox
XOT	Cisco Systems' X.25 over TCP protocol.	Cisco

Y

Abbreviation	Description	Sponsor Organization
YP (NIS)	"Sun Yellow Pages protocol, known now as Network Information Service, is a directory service used for name look-up and general table enumeration."	Sun

Z

Abbreviation	Description	Sponsor Organization
ZIP	"AppleTalk Zone Information Protocol, manages the relationship between network numbers and zone names."	Apple