Motorola RSGu3502 User Manual page 96

Glossary
76 Glossary
DMZ A "de-militarized zone" is one or more hosts logically located between a private LAN and the
Internet. A DMZ prevents direct access by outside users to private data. (The term comes from
the geographic buffers located between some conflicting countries such as North and South
Korea.) In a typical small DMZ configuration, the DMZ host receives requests from private LAN
users to access external web sites and initiates sessions for these requests. The DMZ host cannot
initiate a session back to the private LAN. Internet users outside the private LAN can access only
the DMZ host. You can use a DMZ to set up a web server or for gaming without exposing
confidential data.
DOCSIS The Data-Over-Cable Service Interface Specification define a standard interface for cable modems
to deliver data between a cable network and computer systems. Euro-DOCSIS is DOCSIS adapted
for use in Europe.
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 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-to-IP address matches.
domain name A unique name, such as motorola.com, that maps to an IP address. Domain names are typically
much easier to remember than IP addresses.
Method of representing an IP address or subnet mask using four decimal numbers called octets.
dotted-decimal
format
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 RSGu3502
LAN default configuration, 192.168.15 represents the network address. In the final octet, the host
address can be from 2 to 254.
download To copy a file from one computer or other network device to another. You can use the Internet to
download files from a server to your home computer. Your residential gateway downloads its
configuration file and firmware.