Carrier Access CMG Router - Manual (Page 283)

CMG Router - Release 2.7 Glossary - 5
Glossary
LMI Local Management Interface. A specification for the use of frame-relay
products that define a method of exchanging status information between
devices such as routers.
Loopback A diagnostic test in which a signal is transmitted across a medium while
the sending device waits for its return.
Media Access
Control (MAC) The lower of the two sub-layers of the data link layer defined by the
IEEE. The MAC sub-layer handles access to shared media, such as
whether token passing or contention will be used. The MAC contains the
standardized data link layer address that is required for every port or
device that connects to a LAN. Other devices in the network use these
addresses to locate specific ports in the network and to create and update
routing tables and data structures. MAC addresses are 6 bytes long and
are controlled by the IEEE.
Mbps Million Bits Per Second.
MCMP Multi-Channel Multi-Point. MCMP is a circuit card that enables the
support of up to six independent applications over a single multipoint
digital facility. The MCMP capability can support up to 40 tributary
DSUs, each optioned with an MCMP card.
Multilink PPP Multilink Point-to-Point Protocol. A method where packet data traffic is
spread across multiple serial WAN links in order to increase transmission
speed.
NAT Network Address Translation. An Internet standard that enables a local-
area network (LAN) to use one set of IP addresses for internal traffic and
a second set of addresses for external traffic. A NAT box located where
the LAN meets the Internet makes all necessary IP address translations.
NTP Network Time Protocol, developed to maintain a common sense of time
among Internet hosts around the world. Many systems on the Internet run
NTP, and have the same time (relative to Greenwich Mean Time).
PAP Password Authentication Protocol. An authentication protocol that
allows Point-to-Point Protocol peers to authenticate one another.