Motorola SURFBOARD SVG2500 - Manual (Page 165)

17 GLOSSARY
150
TERM DEFINITION
MHz Megahertz — one million cycles per second. A measure of
radio frequency.
MPDU MAC protocol data unit (PDU)
MSDU MAC service data unit.
MSO Multiple Systems Operator. A company that owns and operates
more than one cable system. Also called a group operator.
MTU The Maximum Transmission Unit is the largest amount of data
that can be transmitted in one discrete message on a given
physical network. The MTU places an upper limit on the size
of a message that can be transferred by the network in a single
frame. Messages exceeding the MTU must be fragmented
before transmission and reassembled at the destination.
Multicast A data transmission sent from one sender to multiple
receivers. See also broadcast and unicast.
mW milliwatts
N
TERM DEFINITION
NAS Network access server
NAT Network Address Translation is an Internet standard for a LAN to
use one set of IP addresses for internal traffic and a second set
of IP addresses for external traffic.
NAPT Network Address Port Translation is the most common form of
address translation between public and private IP addresses.
NAPT maps one public IP address to many private IP
addresses. If NAPT is enabled on the Basic Setup Page, one
public IP address is mapped to an individual private IP
address for up to 245 LAN clients.
NEC National Electrical Code (United States) — The regulations
for construction and installation of electrical wiring and
apparatus, suitable for mandatory application by a wide range of
state and local authorities.
network Two or more computers connected to communicate with each
other. Networks have traditionally been connected using some
kind of wiring.
network driver Software packaged with a NIC that enables the computer to
communicate with the NIC.
network layer Layer 3 in the OSI architecture that provides services to
establish a path between open systems. The network layer
knows the address of the neighboring nodes, packages output