L1 

Layer 1 (physical layer)

L2 

Layer 2 (data link layer)

L2F 

Layer Two Forwarding

L2TP 

Layer Two Tunnelling Protocol

L3 

Layer 3 (network layer)

LA 

Location Area

LAC 

Link Access Control

LAN 

Local Area Network

LANE 

LAN Emulation

LAPD 

Link Acces Protocol on D channnel

LAPDm 

Link Access Protocol for the Dm Channel

LB-TDD 

Large Band TDD

LC 

Link Connection

LCD 

Low Constrained Delay data

LCS 

Location Services

LDAP 

Lightweight Directory Authentication Protocol

LE 

Local Exchange

LE_ARP 

LAN Emulation Address Resolution Protocol

LEC 

LAN Emulation Client

LECID 

LAN Emulation Client Identifier

LECS 

LAN Emulation Configuration Server

LES 

LAN Emulation Server

LEX 

Local Exchange

LGN 

Logical Group Node

LIG 

Lawful Interception Gateway

LIR 

Local Internet Registry

LL 

Leased Lines

LLC 

Logical Link Control

LMDS 

Local Multichannel Distribution Services

LNNI 

LANE NNI

LOC 

Loss Of Cell delineation

Local Loop 

Part of the network between customers and the subscriber units

Local Switch 

Switch connceting the customers to the network

LOF 

Loss Of Frame

LOP 

Loss Of Pointer

LRAIC 

Long Run Average Incremental Costs

LSB 

Least Significant Bit

LSR 

Leaf Set-up Request

LSU 

Local Subscriber Unit

LUNI 

LANE UNI

LWDG 

Lucent Wireless Data Gateway