Glossary - Ubee DDW262.G User Manual

9

Glossary

This chapter defines terms used in this guide and in the industry.
Broadcast
A packet sent to all devices on a network.
Cable Modem Termination System (CMTS)
Typically located in the cable company's headend, the CMTS is equipment that provides high-
speed data services to subscribers, such as cable Internet and VoIP.
Channel Bonding
A computer networking configuration where two or more network interfaces are combined on
a host computer for redundancy or increased throughput. Data is transmitted over these
channels as if they are one channel.
Customer Premises Equipment (CPE)
Equipment such as telephones, routers, and modems located at a subscribers location to
enable customers access to communication services.
Default Gateway
The routing device used to forward all traffic that is not addressed to a computer on the local
subnet.
Demilitarized Zone (DMZ)
Allows one IP address (or computer) to be placed in between the firewall and the Internet
(usually for gaming and video conferencing). This allows risky, open access to the Internet.
Domain
A subnetwork comprised of a group of clients and servers under the control of one security
database.
Domain Name
A descriptive name for an address or group of addresses on the Internet. Domain names are
in the form of a registered entity name plus one of a number of predefined top-level suffixes,
such as .com, .edu, .org.
Domain Name System (DNS)
An Internet service that locates and translates domain names into IP addresses. Because
domain names are alphabetic, they are easier to remember. However, the Internet is based
on IP addresses. Every time you use a domain name, a DNS service translates the name into
the corresponding IP address. The DNS system is actually its own network. If one DNS server
does not know how to translate a particular domain name, it asks another one, and so on, until
the correct IP address is returned.
Downstream
A term to describe the direction of data from the network service provider to the customer.
Ubee DVW222B.F Wireless Voice Cable Modem and Router Subscriber User Guide • November 2011 71