Motorola SURFBOARD SVG2500 - Manual (Page 157)

17 GLOSSARY
142
TERM DEFINITION
DNS The Domain Name System is the Internet system for converting
domain names to IP addresses. A DNS server contains a table
matching domain names, such as Internetname.com, to IP
addresses, such as 192.169.9.1. When you access the world-
wide web, a DNS server translates the URL displayed on the
browser to the destination website IP address. The DNS lookup
table is a distributed Internet database; no one DNS server lists
all domain names to IP address matches.
DOCSIS The CableLabs Data-Over-Cable Service Interface Specification
defines interface standards for cable modems, gateways, and
supporting equipment to deliver data between an HFC network
and computer systems or television sets. To emphasize its use
as a cable modem standard, DOCSIS is now called CableLabs
Certified Cable Modems. Euro-DOCSIS is DOCSIS adapted for
use in Europe.
domain name A unique name, such as motorola.com , that maps to an IP
address. Domain names are typically much easier to remember
than are IP addresses.
dotted-decimal
format A method of representing an IP address or subnet mask using
four decimal numbers called octets. Each octet represents
eight bits.
In a class C IP address, the octets are
“network.network.network.host.” The first three octets
together represent the network address and the final octet is
the host address. In the SVG2500 LAN default configuration,
192.168.100 represents the network address. In the final octet,
the host address can range from 2 to 254.
download To copy a file from one computer to another. You can use
the Internet to download files from a server to a computer.
A DOCSIS or Euro-DOCSIS cable modem or gateway
downloads its configuration file from a TFTP server during start-
up.
downstream In a cable data network, the direction of data received by the
computer from the Internet.
driver Software that enables a computer to interact with a network or
other device. For example, there are drivers for printers,
monitors, graphics adapters, modems, Ethernet, USB, HPNA,
and many others.
DSL Digital Subscriber Line
DSSS Direct Sequence Spread Spectrum is an IEEE 802.11b RF
modulation protocol.