Glossary of Terms 275
IPC: Inter-process Communications (Vines)
IPL: Initial program load
IPSec: Internet Protocol Security
IPX: Internet packet exchange
IRB: Integrated routing and bridging
IS: Intermediate system
(ISC)
2
: International Information Systems Security Certification Consor-
tium
ISDN BRI: Integrated Services Digital Network — Basic Rate Interface
ISDN PRI: Integrated Services Digital Network — Primary Rate Interface
ISIS: Intermediate System Intermediate System (OSI standard routing
protocol)
ISO: International Organization for Standardization
ISP: Internet service provider
ISSA: Information Systems Security Association
ITL: Information Technology Laboratory
ITSEC: Information Technology Security Evaluation Criteria
ITU: International Telecommunications Union
ITU-T: ITU Telecommunication Standardization Sector
JPEG: Joint Photographic Experts Group
LAN: Local area network
LAPB: Link Access Procedure — Balanced
LAPD: Link Access Procedure on the D Channel
LAPF: Link Access Procedure for Frame-Mode Bearer Services
LAT: Local area transport
LCN: Logical Channel Number (X.25)
LCP: Link Control Protocol (X.25)
LDN: Local dial number (ISDN)
LLC: Logical Link Control
LMI: Local Management Interface (Frame Relay)
LSA: Link-state advertisement
LSP: Link state packet
LT: Local termination
MAC (1): Mandatory Access Control
MAC (2): Message Authentication Code
MAC (3): Media Access Control
MAN: Metropolitan area network
MAP: Manufacturing Automation Protocol
MAU: Media Attachment Unit
MDx: Message Digest (e.g., MD5)
MIB: Management information base
MIDI: Musical instrument digital interface
MW: Multi-channel interface proccessor
MLP: Multi-link PPP
MMP: Multi-chassis Multi-link PPP
MOP: Maintenance Operation Protocol
MP: Multi-link Protocol
MPEG: Motion Picture Experts Group
MPR: Multi-protocol PC-based routing
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