Motorola VT2142 manual Glossary, Domain name, Dotted-decimal, Format

Overview Installation Troubleshooting Contact FAQ

Configuration: Basic Advanced TCP/IP

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Glossary

This glossary defines terms and abbreviations used in this manual. To return to your previous page, click the Adobe® Reader® Go to Previous View button.

10/100Base-T adapter

broadband

broadband provider

cable modem

coaxial cable (coax)

See Ethernet.

A device or card that connects a computer, printer, or other peripheral device to the network or to some other device. An Ethernet adapter connects a computer to the LAN.

High-speed telecommunication over a wide range of frequencies, typically 256 Kbps or faster. Broadband enables more information to be transmitted in less time. The most common broadband service types available to homes and small-offices are cable modem and DSL. Both cable modem and DSL are much faster than a traditional dial-up Internet connection.

If you have a cable modem, the cable company from which you subscribe to high-speed data service. If you have a DSL modem, the telephone company from which you subscribe to DSL service.

A device enabling a broadband connection to the Internet over cable television lines. It requires a subscription for high-speed data service from your local cable provider.

A type of wire consisting of a center wire surrounded by insulation and a grounded shield of braided wire traditionally used mainly to carry cable television signals. The shield minimizes electrical and radio frequency interference.

default gateway	A designated router that forwards all traffic not addressed to a host on the local subnet.
DHCP	A Dynamic Host Configuration Protocol server dynamically assigns IP addresses to client hosts on
	an IP network. DHCP eliminates the need to manually assign static IP addresses by “leasing” an
	IP address and subnet mask to each client. It enables the automatic reuse of unused IP addresses.
	The VT2142 can simultaneously be a DHCP client and a DHCP server:
	• A DHCP server at Vonage headend assigns a WAN IP address to your VT2142.
	• The VT2142 contains a built-in DHCP server that assigns private IP addresses to each computer
	on its LAN.
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.
dotted-decimal	Method of representing an IP address or subnet mask using four decimal numbers called octets.
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 VT2142 LAN
	default configuration, 192.168.15 represents the network address. In the final octet, the host address
	can be from 2 to 254.

VT2142 Voice Gateway User Guide 68