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Glossary

LE ARP

LAN Emulation Address Resolution Protocol: The protocol pro-

viding the ATM address that corresponds to a MAC address.

leased line

Permanent connection between two points leased from the

telephone companies.

LEC

LAN emulation client: Software providing the emulation of the link

layer interface that allows the operation and communication of all higher-
level protocols and applications to continue. The LEC runs in all ATM
devices, which include hosts, servers, bridges, and routers. See also: ELAN
and LES.

LECS

LAN emulation configuration server: An important part of emulated

LAN services, providing the configuration data that is furnished upon
request from the LES. These services include address registration for Inte-
grated Local Management Interface (ILMI) support, configuration support
for the LES addresses and their corresponding emulated LAN identifiers, and
an interface to the emulated LAN. See also: LES and ELAN.

LES

LAN emulation server: The central LANE component that provides

the initial configuration data for each connecting LEC. The LES typically is
located on either an ATM-integrated router or a switch. Responsibilities of
the LES include configuration and support for the LEC, address registration
for the LEC, database storage and response concerning ATM addresses, and
interfacing to the emulated LAN. See also: ELAN, LEC, and LECS.

link-state routing algorithm

A routing algorithm that allows each router

to broadcast or multicast information regarding the cost of reaching all its
neighbors to every node in the internetwork. Link-state algorithms provide
a consistent view of the network and are therefore not vulnerable to routing
loops. However, this is achieved at the cost of somewhat greater difficulty in
computation and more widespread traffic (compared with distance-vector
routing algorithms). See also: distance-vector routing algorithm.

LLAP

LocalTalk Link Access Protocol: In a LocalTalk environment, the data

link-level protocol that manages node-to-node delivery of data. This protocol
provides node addressing and management of bus access, and it also controls
data sending and receiving to assure packet length and integrity.

LLC

Logical Link Control: Defined by the IEEE, the higher of two Data Link

layer sublayers. LLC is responsible for error detection (but not correction),

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