Ericsson ECN330, User Manual

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Glossary
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1553-KDU 137 365 Uen D 2006-06-16
may be configured differently to suit the
requirements for specific network applications.
LAN Segment
Separate LAN or collision domain.
Layer 2
Data Link layer in the ISO 7-Layer Data
Communications Protocol. This is related
directly to the hardware interface for network
devices and passes on traffic based on MAC
addresses.
Layer 2 over MPLS (L2MPLS)
L2MPLS
encapsulates Ethernet frames in
MPLS packets and uses label stacking to
tunnel them across a service provider’s
network.
Layer 3
Network layer in the ISO 7-Layer Data
Communications Protocol. This layer handles
the routing functions for data moving from one
open system to another.
LED
Light emitting diode used for monitoring a
device or network condition.
Link Aggregation
See Port Trunk.
Link Aggregation Control Protocol
(LACP)
Allows ports to automatically negotiate a
trunked link with LACP-configured ports on
another device.
Link Segment
Length of twisted-pair or fiber cable joining a
pair of repeaters or a repeater and a PC.
Local Area Network (LAN)
A group of interconnected computer and
support devices.
Media Access Control (MAC)
A portion of the networking protocol that
governs access to the transmission medium,
facilitating the exchange of data between
network nodes.
Management Information Base (MIB)
An acronym for Management Information
Base. It is a set of database objects that
contains information about a specific device.
MD5 Message-Digest Algorithm
An algorithm that is used to create digital
signatures. It is intended for use with 32 bit
machines and is safer than the MD4 algorithm,
which has been broken. MD5 is a one-way
hash function, meaning that it takes a
message and converts it into a fixed string of
digits, also called a message digest.