Nortel Networks NB5PLUS4/W User Manual

Page 103

YML754 Rev1

NB5Plus4/W User Guide

www.netcomm.com.au

Mbps

Abbreviation for Megabits per second, or one million bits

per second. Network data rates are often expressed in

Mbps.

Microfilter

In splitterless deployments, a microfilter is a device that

removes the data frequencies in the DSL signal, so that

telephone users do not experience interference (noise)

from the data signals. Microfilter types include in-line (in-

stalls between phone and jack) and wall-mount (tele-

phone jack with built-in microfilter). See also splitterless.

NAT

Network Address Translation A service performed by

many routers that translates your network’s publicly

known IP address into a Private IP address for each com-

puter on your LAN. Only your router and your LAN know

these addresses; the outside world sees only the public IP

address when talking to a computer on your LAN.

NAT rule

A defined method for translating between public and pri-

vate IP addresses on your LAN.

network

A group of computers that are connected together, al-

lowing them to communicate with each other and share

resources, such as software, files, etc.A network can be

small, such as a LAN, or very large, such as the Internet.

network mask

A network mask is a sequence of bits applied to an IP

address to select the network ID while ignoring the host

ID. Bits set to 1 mean “select this bit” while bits set to 0

mean “ignore this bit.” For example, if the network mask

255.255.255.0 is applied to the IP address 100.10.50.1,

the network ID is 100.10.50, and the host ID is 1. See

also binary, IP address, subnet

NIC

Network Interface Card An adapter card that plugs into

your computer and provides the physical interface to your

network cabling, which for Ethernet NICs is typically an

RJ-45 connector. See Ethernet, RJ-45.

packet

Data transmitted on a network consists of units called

packets. Each packet contains a payload (the data), plus

overhead information such as where it came from (source

address) and where it should go (destination address).

ping

Packet Internet (or Inter-Network) Groper A program

used to verify whether the host associated with an IP

address is online. It can also be used to reveal the IP ad-

dress for a given domain name.

port

A physical access point to a device such as a computer

or router, through which data flows into and out of the

device.

POTS

Plain Old Telephone Service Traditional analog telephone

service using copper telephone lines. Pronounced pots.