Motorola SVG2500 Term Definition Isakmp, Isdn, Iso, Isp, Itu, Term Definition L2F, L2TP, Lac, Lan

17 GLOSSARY
TERM	DEFINITION
ISAKMP	Internet Security Association and Key Management Protocol
ISDN	Integrated Services Digital Network
ISO	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.
ISP	Internet Service Provider
ITU	International Telecommunications Union

K

TERM	DEFINITION
kHz	kilohertz — one thousand cycles per second

L

TERM	DEFINITION
L2F	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.
L2TP	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.
LAC	An L2TP access concentrator is a device to which the client
	directly connects. PPP frames are tunneled through the LAC
	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.
LAN	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.
layer	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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