Glossary
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flow control, framing, and software-sublayer addressing. The predominant
LLC protocol, IEEE 802.2, defines both connectionless and connection-
oriented operations. See also: Data Link layer and MAC.
LMI
Local Management Interface: An enhancement to the original Frame
Relay specification. Among the features it provides are a keepalive mecha-
nism, a multicast mechanism, global addressing, and a status mechanism.
LNNI
LAN Emulation Network-to-Network Interface: In the Phase 2
LANE specification, an interface that supports communication between the
server components within one ELAN.
load balancing
The act of balancing packet load over multiple links to
the same remote network.
local explorer packet
In a Token Ring SRB network, a packet generated
by an end system to find a host linked to the local ring. If no local host can
be found, the end system will produce one of two solutions: a spanning
explorer packet or an all-routes explorer packet.
local loop
Connection from a demarcation point to the closest switching
office.
LocalTalk
Utilizing CSMA/CD, in addition to supporting data transmis-
sion at speeds of 230.4Kbps, LocalTalk is Apple Computer's proprietary
baseband protocol, operating at the Data Link and Physical layers of the OSI
reference model.
logical address
Network layer address that defines how data is sent from
one network to another. Examples of logical addresses are IP and IPX.
LPD
Line Printer Daemon: Used in Unix world to allow printing to an
IP address.
LSA
Link-State Advertisement: Contained inside of link-state packets
(LSPs), these advertisements are usually multicast packets, containing infor-
mation about neighbors and path costs, that are employed by link-state
protocols. Receiving routers use LSAs to maintain their link-state databases
and, ultimately, routing tables.
LUNI
LAN Emulation User-to-Network Interface: Defining the interface
between the LAN emulation client (LEC) and the LAN emulation server
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