Motorola SVG2500 User Manual page 134

This document is uncontrolled pending incorporation in PDM
17 GLOSSARY
TERM
ISAKMP
ISDN
ISO
ISP
ITU
K
TERM
kHz
L
TERM
L2F
L2TP
LAC
LAN
layer
DEFINITION
Internet Security Association and Key Management Protocol
Integrated Services Digital Network
The International Organization for Standardization
(http://www.iso.ch) is a worldwide federation of national
standards bodies from approximately 140 countries. ISO is a non-
governmental organization established in 1947 to promote the
development of standardization and related activities in the world
with a view to facilitating the international exchange of goods and
services, and to developing cooperation in the spheres of
intellectual, scientific, technological, and economic activity.
Internet Service Provider
International Telecommunications Union
DEFINITION
kilohertz — one thousand cycles per second
DEFINITION
Layer 2 Forwarding is an OSI layer 2 protocol that establishes a
secure tunnel across the Internet to create a virtual PPP
connection between the user and the enterprise network.
L2F is the most established and stable layer 2 tunneling
protocol.
Layer 2 Tunnel Protocol is a PPP extension that enables ISPs to
operate VPNs. L2TP merges the best features of the PPTP and
L2F . L2TP is the emerging IETF standard.
An L2TP access concentrator is a device to which the client
directly connects through which PPP frames are tunneled to
the LNS. The LAC need only implement the media over which
L2TP operates to transmit traffic to one or more LNSs. The LAC
may tunnel any protocol carried within PPP . The LAC initiates
incoming calls and receives outgoing calls. A LAC is analogous to
an L2F NAS.
A local area network provides a full-time, high-bandwidth
connection over a limited area, such as a building or campus.
Ethernet is the most widely used LAN standard.
In networks, layers are software protocol levels. Each layer
performs functions for the layers above it. OSI is a reference
model having seven functional layers.
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