1. AAL - ATM Adaptation Layer

2. AAL0 - ATM Adaptation Layer Type 0 refers to raw ATM cells.

3. AAL1 - ATM Adaptation Layer Type 1 supports constant bit rate, time-dependent traffic such as voice and video.

4. AAL2 - ATM Adaptation Layer Type 2 reserved for variable bit rate video transfer.

5. AAL3/4 - ATM Adaptation Layer Type 3/4 supports variable bit rate, delay-tolerant data traffic requiring some sequencing and/or error detection support.

6. AAL5 - ATM Adaptation Layer Type 5 supports variable bit rate, delay-tolerant connection-oriented data traffic requiring minimal sequencing or error detection support.

7. AARP - AppleTalk Address Resolution Protocol

8. ADSP - AppleTalk Data Stream Protocol

9. AEP - AppleTalk Echo Protocol

10. AFP - AppleTalk Filing Protocol

11. ARP/RARP - Address Resolution Protocol / Reverse Address Resolution Protocol

12. ASP - AppleTalk Session Protocol

13. ATCP - AppleTalk Control Protocol

14. ATM - Asynchronous Transfer Mode

15. ATP - AppleTalk Transaction Protocol

16. BACP - Bandwidth Allocation Control Protocol (PPP suite)

17. BAP - Bandwidth Allocation Protocol (PPP suite)

18. BCAST - Broadcast Protocol (Novell protocols)

19. BCC - Broadcast Call Control

20. BCP - Bridging Control Protocol (PPP suite)

21. BGP-4 - Border Gateway Protocol (TCP/IP)

22. B-ICI - BISDN Inter Carrier Interface (ATM PNNI Signalling)

23. BMP (Burst) - Burst Mode Protocol (Novell protocols)

24. BPDU - Bridge Protocol Data Unit

25. BRE - Bridge Relay Encapsulation, proprietary Ascom Timeplex protocol that extends bridging across WAN links by means of encapsulation (Frame Relay).

26. BVCP - PPP Banyan VINES Control Protocol (PPP suite)

27. CCITT - International Telegraph and Telephone Consultative Committee (after the French)

28. CCP - Compression Control Protocol (PPP suite)

29. CHAP - Challenge Handshake Authentication Protocol (PPP suite)

30. CIF - Cells in Frames (ATM over LAN)

31. COPS - Common Open Policy Service

32. CTERM - Command Terminal (DECnet)33. DAP - Data Access Protocol (DECnet)

34. DCAP - Data Link Switching Client Access Protocol

35. DCP - Data Compression Protocol over Frame Relay

36. DCPCP - DCP Control Protocol

37. DDP - Datagram Delivery Protocol (AppleTalk)

38. DECnet - Digital Equipment Corporation protocols developed to communicate between DEC minicomputers.

39. DHCP - Dynamic Host Configuration Protocol (TCP/IP)

40. DIAG - Diagnostic Responder protocol (Novell)

41. DLSw - Data Link Switching (IBM SNA)

42. DNCP - PPP DECnet Phase IV Control Protocol (PPP suite)

43. DNS - Domain Name Server protocol (TCP/IP)

44. DSMCC - Digital Storage Media Command and Control (Audio Visual over ATM)

45. DVB - Digital Video Broadcasting46. ECP - Encryption Control Protocol (PPP suite)

47. ES-IS - End system to Intermediate System protocol (ISO protocols)

48. Ethernet - LAN protocol synonymous with IEEE 802.3 standard49. FANAP - Flow Attribute Notification Protocol

50. FDDI - Fiber Distributed Data Interface, standardized by ANSI

51. FTP - File Transfer Protocol (TCP/IP)

52. FUNI - Frame-based UNI (User Network Interface)53. GCC - Group Call Control

54. GMM - GPRS Mobility Management

55. GSM - GPRS Session Management

56. GSMP - General Switch Management Protocol (IP Switching)

57. GTP - GPRS Tunelling Protocol

58. HDLC - High Level Data Link Control protocol developed by ISO, based on pioneering work by IBM on SDLC.

59. HPR-APPN - High Performance Routing Advanced Peer to Peer Network, IBM network architecture for dynamic routing across arbitrary network topologies.

60. HTTP - Hypertext Transfer Protocol (TCP/IP)61. ICMP - Internet Control Message Protocol (TCP/IP)

62. ICMPv6 - revision of ICMP (TCP/IP)

63. ICP - Internet Control Protocol (Banyan)

64. IDP - Internet Datagram Protocol (XNS)

65. IFMP Ipsilon Flow Management Protocol (IP Switching)

66. IGMP - Internet Group Management Protocol (TCP/IP)

67. IGRP - Interior Gateway Routing Protocol (TCP/IP)

68. IISP - Interim Interswitch Signalling Protocol (ATM Signalling)

69. ILMI - Interim Local Management Interface, bi-direction exchange of management information between UMEs.

70. IP - Internet Protocol, routing layer datagram service of the TCP/IP suite.

71. IPC - InterProcess Communications protocol, datagram and reliable message delivery service for Banyan.

72. IPCP - IP Control Protocol, responsible for configuring the IP parameters on both ends of the PPP link.

73. IPHC - IP Header Compression

74. IPv6 - revised version of IP (TCP/IP)

75. IPv6CP - IPv6 PPP Control Protocol, responsible for configuring, enabling and disabling the IPv6 protocol modules on both ends of a PPP link.

76. IPX - Internetwork Packet Exchange, Novell's implementation of the Xerox Internet Datagram Protocol (IDP).

77. IPXCP - IPX PPP Control Protocol, choose and configure the IPX network-layer protocol over PPP.

78. ISDN - Integrated Services Digital Network, all digital communications line that allows for transmission of voice, data, video and graphics, at very high speeds, over standard communication lines.

79. LDAP - Lightweight Directory Access Protocol

80. LDP - Label Distribution Protocol

81. LCP - Link Control Protocol, establishes, configures and tests the data link connection (PPP suite).

82. LLC - Logical Link Control protocol (IEEE 802.2), provides a link mechanism for upper layer protocols.

83. LQR - Link Quality Report, specifies the mechanism for link quality monitoring with PPP84. M2UA - used for backhauling of SS7 MTP2-User signalling messages over IP using Stream

Control Transmission Protocol (SCTP)

85. M3UA - supports transport of SS7 MTP3-User sugnalling over IP using Stream Control Transmission Protocol (SCTP)

86. MAPOS - Multiple Access Protocol over SONET / SDH

87. MARS - Multicast Address Resolution Server (TCP/IP)

88. Megaco - Media Gateway Control

89. 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).

90. MOP - Maintenance Operation Protocol, utility services such as uploading and downloading system software, remote testing and problem diagnosis (DECnet).

91. MOUNT - protocol used to initiate client access to a server supporting NFS.

92. MPEG - Motion Picture Experts Group, ISO standards group dealing with video and audio compression.

93. MPLS - Multi Protocol Label Switching, set of procedures for augmenting network layer packets with "label stacks", thereby turning them into labeled packets.

94. MPOA - Multi Protocol Over ATM, deals with efficient transfer of inner-subnet unicast data in a LAN emulation environment.

95. MPPC - Microsoft Point-to-Point Compression Protocol

96. MTP-2 - Message Transfer Part, Level 2, signalling link which together with MTP-3 provides reliable transfer of signalling messages between two directly connected signalling points (SS7).

97. MTP-3 - Message Transfer Part, Level 3, connects Q.SAAL to the users (SS7 suite).98. PAP - Printer Access Protocol, manages the virtual connection to printers and other servers

(AppleTalk).

99. PAP - Password Authentication Protocol, provides a simple method for the peer to establish its identity using a 2-way handshake (PPP suite).

100. PEP - Packet Exchange Protocol, provides a semi-reliable packet delivery service that orients towards single-packet exchanges (XNS).

101. PIM - Protocol Independent Multicast-Sparse Mode (PIM-SM)

102. PMAP - Port Mapper protocol, manages the allocation of transport layer ports to network server applications (Sun).

103. PNNI - Private Network-to-Network Interface, hierarchial, dynamic link-state routing protocol (ATM).

104. POP3 - Post Office Protocol version 3, permits workstations to dynamically access a maildrop on a server host (TCP/IP).

105. PP - ISO Presentation Protocol, performs context negotiation and management between open systems.

106. PPP - Point-to-Point Protocol, designed for simple links which transport packets between two peers.

107. 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".

108. PPP-BPDU - PPP Bridge Protocol Data Unit, used to connect remote bridges.

109. PPTP - Point-to-Point Tunneling Protocol, allows PPP to be channeled through an IP network (PPP).

110. RLP - Radio Link Protocol

111. RM Cells - Rate Management cells (ATM cells).

112. RND - name of a company which uses a proprietary protocol header (RND) to transfer LAN protocols via WAN.

113. RP - Routing Protocol, distributes routing information among DECnet hosts.

114. RPC - Remote Procedure Call protocol, activates a function on a remote station and retrieves the result (Sun).

115. RSVP - Resource ReSerVation setup Protocol, designed for an integrated services Internet (TCP/IP).

116. RTMP - Routing Table Maintenance Protocol, manages routing information for AppleTalk networks.

117. RTP - Routing Update Protocol, used to distribute network topology (Banyan).

118. RUDP - Reliable UDP

119. RVP - Remote Voice Protocol

120. SAP - Novell's Service Advertising Protocol, provides information about what servers are available on the network.

121. SCCP - Signalling 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).

122. SCP - Session Control Protocol, manages logical links for DECnet connections.

123. SCSP - is a routine protocol in the TCP/IP family.

124. SCTP - Stream Control Transmission Protocol

125. SDP - Session Description Protocol

126. SDCP - PPP Serial Data Control Protocol, responsible for configuring, enabling and disabling the SDTP modules on both ends of the point-to-point link.

127. SDLC - Synchronous Data Link Control protocol, developed by IBM to be used as the layer 2 of the SNA hierarchical network.

128. SER - Serialization packet, ensures that a single version of NetWare is not being loaded on multiple servers.

129. SIP - SMDS Interface Protocol, three-level protocol that controls access to the network.

130. SIP (VoIP) - Session Initiation Protocol

131. SLP - Servise Location Protocol

132. SMB - Server Message Block, Microsoft presentation layer protocol providing file and print sharing functions for LAN Manager, Banyan VINES and other networking operating systems.

133. SMDS - Switched Multimegabit Data Service, broadband networking technology developed by Bellcore.

134. SMS - Short Message Service (UMTS)

135. SMS - Short Message Service

136. SMPP - Short Message Peer to Peer

137. SMTP - Simple Mail Transfer Protocol, mail service modeled on the FTP file transfer service (TCP/IP).

138. SNA - Systems Network Architecture, introduced by IBM to provide a framework for joining together many mutually incompatible IBM products for distributed processing.

139. SNACP - SNA PPP Control Protocol, responsible for configuring, enabling and disabling SNA on both ends of the point-point link (PPP).

140. SNMP - Simple Network Management Protocol, developed by the Internet community to allow diverse network objects to participate in a global network management architecture.

141. SOCKS -

142. SPANS - Simple Protocol for ATM Network Signalling, developed by FORE Systems for use in ATM networks.

143. SPP - Sequenced Packet Protocol, provides a reliable virtual connection service for private connections (Banyan).

144. SPP - Sequenced Packet Protocol, provides reliable transport delivery with flow control (XNS).

145. 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.

146. SRB - Source Routing Bridging, proprietary header of Bay Networks which passes Token Ring information over WAN lines.

147. SRP - Spatial Reuse Protocol.

148. SS7 - Signalling System 7, a common channel signalling system.

149. STP - Spanning Tree Protocol, prevents the formation of logical looping in the network (DECnet).

150. TALI - Transport Adapter Layer Interface

151. TCAP - Transaction Capabilities Application Part, enables the deployment of advanced intelligent network services by supporting non-circuit related information exchange between signalling points using the SCCP connectionless service (SS7).

152. TCP - Transmission Control Protocol, provides a reliable stream delivery and virtual connection service to applications through the use of sequenced acknowledgement with retransmission of packets when necessary (TCP/IP).

153. TDP - Tag Distribution Protocol, a two party protocol that runs over a connection oriented transport layer with guaranteed sequential delivery.

154. TELNET - Terminal emulation protocol of TCP/IP.

155. TFTP - Trivial File Transfer Protocol, supports file writing and reading (TCP/IP).

156. THDR - Transport Layer Header, used by RTP endpoints to provide correct processing of the packet (SNA).

157. Timeplex (BRE2) - Bridge Relay Encapsulation, proprietary Ascom Timeplex protocol that extends bridging across WAN links by means of encapsulation (Frame Relay).

158. Token Ring - LAN protocol where all stations are connected in a ring and each station can directly hear transmissions only from its immediate neighbor.

159. UDP - User Datagram Protocol, provides a simple but unreliable message service for transaction-oriented services (TCP/IP).

160. UMTS -

161. 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.

162. Van Jacobson - compressed TCP protocol which improves the TCP/IP performance over low speed serial links.

163. VARP - VINES Address Resolution Protocol, used for finding the node Data Link Control address from the node IP address (Banyan).

164. VCI - Virtual Channel Identifier.

165. VGCS - Voice Group Call Service

166. ViVID MPOA - proprietary protocol of Newbridge which provides bridged LAN Emulation and routed LAN Emulation functionality.

167. VPI - Virtual Path Identifier

168. VRRP - Virtual Router Redundancy Protocol

169. WAE - Wireless Application Environment

170. WAP - Wireless Application Protocol

171. WCCP - Web Cache Coordination Protocol

172. 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).

173. Wellfleet BOFL - Wellfleet Breath of Life, used as a line sensing protocol.

174. Wellfleet SRB - Source Routing Bridging, proprietary header of Bay Networks which passes Token Ring information over WAN lines.

175. WML -

176. WSP - Wireless Session Protocol

177. WTLS - Wireless Transport Layer Security

178. WTP - Wireless Transaction Protocol

179. X.25 - CCITT's recommendation for the interface between a DTE and DCE over a PSTN.

180. X.75 - Signalling system which is used to connect packet switched networks (such as X.25) on international circuits.

181. XNS - Xerox Network System protocols, provide routing capability and support for both sequenced and connectionless packet delivery.

182. XOT - Cisco Systems' X.25 over TCP.