ZyXEL Communications Prestige 941, User Manual, Page: 89 / 99

Prestige 941 Cable Router
Glossary C
DTE : Originally, the DTE (data terminal equipment) was a dumb terminal or printer, but today it is a
computer, or a bridge, or router that interconnects local area networks.
EMI
: ElectroMagnetic Interference. The interference by electromagnetic signals that can cause reduced data
integrity and increased error rates on transmission channels.
Ethernet
: A very common method of networking computers in a LAN. There are a number of adaptations to
the IEEE 802.3 Ethernet standard, including adaptations with data rates of 10 Mbits/sec and 100 Mbits/sec
over coaxial cable, twisted-pair cable and fiber-optic cable. The latest version of Ethernet, Gigabit Ethernet,
has a data rate of 1 Gbit/sec.
FTP : File Transfer Protocol is an Internet file transfer service that operates on the Internet and over TCP/IP
networks. FTP is basically a client/server protocol in which a system running the FTP server accepts
commands from a system running an FTP client. The service allows users to send commands to the server for
uploading and downloading files.
Gateway
: A gateway is a computer system or other device that acts as a translator between two systems that
do not use the same communication protocols, data formatting structures, languages, and/or architecture.
Headend
: Central distribution point for a CATV system. Video signals are received here from satellites and
maybe other sources, frequency converted to the appropriate channels combined with locally originated
signals and rebroadcast onto the HFC plant. The headend is where the CMTS is normally located.
HFC : HFC (hybrid fiber coaxial cable) is a telecommunication technology in which fiber optic cable and
coaxial cable are used in different portions of a network to carry broadband content (such as video, data and
voice). Typically, a local cable TV company might use fiber optic cable from the cable headend (distribution
center) to serving nodes located close to business and residential users and from these nodes use coaxial cable
to individual businesses and homes. An advantage of HFC is that some of the characteristics of fiber optic
cable (high bandwidth and low noise and interference susceptibility) can be brought close to the user without
having to replace the existing coaxial cable that is installed all the way to the home and business.
Host
: Any computer on a network that is a repository for services available to other computers on the
network. It is quite common to have one host machine provide several services, such as WWW and USENET.
HTTP
: HyperText Transfer Protocol.
IANA : Internet Assigned Number Authority acts as the clearinghouse to assign and coordinate the use of
numerous Internet protocol parameters such as Internet addresses, domain names, protocol numbers and more.
The IANA web site is at http://www.isi.edu/iana.