Glossary
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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 sharing of paths to a 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.
local services
Users trying to get to network services that are located on
the same subnet or network are defined as local services. Users do not cross
Layer 3 devices, and the network services are in the same broadcast domain
as the users. This type of traffic never crosses the backbone.
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.
local VLANs
Local VLANs are configured by geographic location; these
locations can be a building or just a closet in a building, depending on switch
size. Geographically configured VLANs are designed around the fact that the
business or corporation is using centralized resources, like a server farm.
loop avoidance
If multiple connections between switches are created for
redundancy, network loops can occur. STP is used to stop network loops and
allow redundancy.
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 pro-
tocols. Receiving routers use LSAs to maintain their link-state databases and,
ultimately, routing tables.
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