Agilent Technologies HSSI WanProbe J3916A - Manual (Page 161)

Glossary
141
LAN (Local Area Network)
A general-purpose communications network that interconnects a variety of
devices within a limited geographical area. Two common LANs, IEEE 802.3 and
Ethernet, have compatible cabling requirements, and can co-exist on a common
installation, but have different protocols. A LAN might connect computers on
adjacent desks, within a building, or within several buildings of a campus. See
also extended LAN.
LAN cable
A short distance network (up to a few thousand meters) used to connect many
network devices using a communication standard. LAN cables come in many
types. For example, thick (10 mm) coaxial cable, thin (5 mm) coaxial cable, fiber-
optic cable, and twisted-pair cable.
LAP-F (Link Access Procedure, Frame-Relay)
HDLC derivative level 2 link protocol required by Frame Relay.
Layer
A level in the hierarchy of telecommunications protocols. Protocols in the higher
layers inter-operate with those in the lower layers.
LCI (Logical Channel Identifier) also called Combined LCN
The combination of the 4 LGCN and 8 LCN bits into a 12 bit virtual circuit
identifier field. The range is 0 to 4095
Leased Line
Permanent link in a data communication network provided by a commercial
communications supplier.
Leased Line
Permanent connection for private use within a data communication network
independent of the public switching and signalling equipment.
Line
T1 and E1 equivalent of DCE. The signal from the Central Office to the User.