K-Q

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K (Kilo)	one thousand (e.g., Kbps)
KB	kilobyte
L2TP	Layer 2 Tunneling Protocol
LAN	local area network
LANE	local area network emulation
LANRES	LAN resource extension and services (IBM Corp.)
LAT	local area transport (Digital Equipment Corp.)
LATA	local access transport area
LAVC	local area VAX cluster (Digital Equipment Corp.)
LBO	line buildout
LCD	liquid crystal display
LCN	local channel number
LD	long distance
LDAP	Lightweight Directory Access Protocol
LEC	local exchange carrier
LED	light emitting diode
LEO	low Earth orbit
LIB	label information base
Li-Ion	lithium ion
LL	line loopback
LLC	link level control
LMDS	local multipoint distribution service
LMI	link management interface
LSB	least significant bit
LSI	large-scale integration
LSP	label switched path
LSR	label switch router
LU	logical unit (IBM Corp.)
LUN	logical unit number
M (Mega)	one million (e.g., Mbps)
MA	mobility agent
MAC	media access control
MAC	moves, adds, changes
MAN	metropolitan area network
MAU	medium access unit
MAU	multiple access unit
MAU	multistation access unit
MB	megabyte
MCA	Micro Channel Architecture (IBM Corp.)
MCU	multicast unit
MD	mediation device
MDS	multipoint distribution service
MES	master Earth station
MF	mediation function
MGC	media gateway controller
MGCP	Media Gateway Control Protocol
MI	management interface
MIB	management information base
MIC	Management Integration Consortium
MIF	management information format
MII	media independent interface
MIPS	millions of instructions per second
MMDS	multichannel multipoint distribution service
MPLS	multiprotocol label switching
ms	millisecond
MTBF	mean time between failure
MTSO	mobile telephone serving office
MTTR	mean time to response
MTTR	mean time to repair
MTU	maximum transfer unit
MVC	multicast virtual circuit
MVPRP	multivendor problem resolution process
NACK	negative acknowledgement
NAP	network access point
NAS	network attached storage
NAT	network address translation
NAU	network addressable unit (IBM Corp.)
NAUN	nearest active upstream neighbor
NCP	Network Control Program (IBM Corp.)
NCP	network control point
NDS	Novell directory services
NE	network element
NEBS	new equipment building specifications
NEF	network element function
NetBIOS	network basic input/output system
NFS	network file system
NIC	network interface card
NiCd	nickel cadmium
NiMH	nickel metal hydride
NIPC	National Infrastructure Protection Center
NIST	National Institute of Standards and Technology
NIU	network interface unit
NLM	NetWare Loadable Module (Novell Inc.)
nm	nanometer
NM	network manager
NMS	NetWare Management System (Novell, Inc.)
NMS	network management system
NNI	network-to-network interface
NNM	Network Node Manager (Hewlett-Packard Co.)
NNTP	Network News Transport Protocol
NNX	exchange number
NOC	network operations center
NOS	network operating system
NPA	numbering plan area
NPC	network protection capability (AT&T)
NPV	net present value
NSA	National Security Agency
NSOC	network security operations center
NTP	Network Time Protocol
OAM&P	operations, administration, management, and provisioning
OC	optical carrier
OC-3	optical carrier signal: level three (155 Mbps)
OCR	optical character recognition
ODBC	open database connectivity (Microsoft Corp.)
OEM	original equipment manufacturer
OEO	optical-electrical-optical
OID	object identification or identifier
OLE	object linking and embedding
OLTP	on-line transaction processing
OMA	object management architecture
OMF	object management framework
OMG	Object Management Group
OOF	out of frame
OOP	object-oriented programming
OPX	off-premises extension
ORB	object request broker
OS	operating system
OS/2	operating system/2 (IBM Corp.)
OSF	Open Software Foundation
OSF	operations systems function
OSFI	open system fabric initiative
OSI	open systems interconnection
OSPF	open shortest path first
OSS	operations support system
OTDR	optical time domain reflectometry
PA	preamble
PAD	packet assembler-disassembler
PAP	Password Authentication Protocol
PAR	peak-to-average ratio
PARC	Palo Alto Research Center
PAT	port address translation
PBX	private branch exchange
PC	personal computer
PCAMI	PC Asset Management Institute
PCI	peripheral component interconnect
PCM	pulse code modulation
PCS	personal communications service
PDA	personal digital assistant
PDN	packet data network
PDS	premises distribution system (AT&T)
PDU	payload data unit
PDU	protocol data unit
PEM	privacy enhanced mail
PGP	pretty good privacy
PHB	per hop behavior
PHY	physical (layer)
PIM	Protocol Independent Multicast
PKI	public key infrastructure
PnP	plug and play
PoE	power over Ethernet
PoP	point of presence
PoS	point of sale
PPP	Point-to-Point Protocol
Pps	packets per second
PRI	primary rate interface (ISDN)
PSN	packet-switched network
PSP	Power Saving Protocol
PSTN	public-switched telephone network
PTT	Post Telephone & Telegraph
PU	physical unit (IBM Corp.)
PVC	permanent virtual circuit
QAF	Q adaptor function
QC	quality control
QoS	quality of service
QRW	quasi-random word

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