1. Glossary and Terms (Download PDF)

2. A usful list of Acronyms 
A B C D E F G H I J K L M N O P Q R S T U V W X   
LAN     Local Area Network
LANE    LAN Emulation (ATM)
LAPB    Link Access Protocol - Balanced
LAPD    Link Access Protocol - D channel
LAPF    Link Access Protocol - Frame Relay
LDAP    Lightweight Directory Access Protocol
LDP     Label Distribution Protocol
LER     Label Edge Router
LIC     Line Interface Card
LiNbO3  Lithium Niobate
LLC     Logical Link Control
LMI     Local Management Interface
LSP     Label Switched Path
LSR     Label Switched Router
LSSU    Link Status Signalling Unit (SS7)