Ubee DVW3201B Subscriber User Manual page 92

Ubee Interactive
Downstream
A term to describe the direction of data from the network service provider to the customer.
Dynamic Host Configuration Protocol (DHCP)
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.
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 and XNS.
Firewall
A highly effective method to block unsolicited traffic from outside the connected
computers in your gateway.
Gateway
A local device, usually a router, that connects hosts on a local network to other networks
– sometimes with different incompatible communication protocols.
Headend
A main facility to process and distribute Internet communication signals. Headend may
also refer to cable television signals and power line communication facilities.
Internet Protocol (IP)
The method or protocol by which data is sent from one computer to another on the
Internet. It is a standard set of rules, procedures, or conventions relating to the format and
timing of data transmission between two computers that they must accept and use to
understand each other. Used in conjunction with the Transfer Control Protocol (TCP) to
form TCP/IP.
IP Address
In the most widely installed level of the IP today, an IP address is a 32-bit binary digit
number that identifies each sender or receiver of information that is sent in packet form
across the Internet. When you request a Web page or send an e-mail, the IP part of
TCP/IP includes your IP address. IP sends your IP address to the IP address obtained by
looking up the domain name in the URL you requested or in the e-mail address to which
you are sending a note. A dynamic IP address is an IP address that is automatically
assigned to a client station in a TCP/IP network, typically by a DHCP server.
Internet Service Provider (ISP)
A company that provides individuals and companies access to the Internet and other
related services.
88 Ubee DDW3612 Wireless Cable Modem Gateway Subscriber User Guide • July 2012