Ubee DVW32CB Subscriber User Manual page 109

Ubee Interactive
DHCP (Dynamic Host Configuration Protocol)
A protocol that centrally automates the assignment of IP addresses in a network. Using
the Internet's set of protocols (TCP/IP), each machine that can connect to the Internet
needs a unique IP address. For example, when the service provider sets up computer
users with a connection to the Internet, an IP address is assigned to each machine.
DHCP lets the service provider distribute IP addresses and automatically sends a new IP
address when a computer is plugged in to the high-speed Internet network. DHCP uses
the concept of a "lease" or amount of time an IP address is valid for a computer. Lease
times can vary.
DMZ (Demilitarized Zone)
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.
DOCSIS (Data Over Cable Service Interface Specification)
An International telecommunications standard that permits the addition of high-speed data
transfer over an existing cable TV system.
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.
DoS (Denial of Service) Attack
An attempt to make a machine or network resources unavailable to its intended users.
DNS (Domain Name System)
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.
DTIM (Delivery Traffic Indication Message)
Informs clients about the presence of buffered broadcast data on the access point.
Ethernet
A standard network protocol that specifies how data is placed on and retrieved from a
common transmission medium. It forms the underlying transport vehicle used by several
upper-level protocols, including TCP/IP, HTTP, and FTP.
Ubee DVW32CB Advanced Wireless Voice Gateway Subscriber User Guide • January 2015
Glossary
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