ZyXEL Communications Prestige 964 User Manual page 51

Ethernet cable example, a data terminal equipment (DTE) device and a data communications equipment (DCE)
device. A straight through Ethernet cable is the most common cable used.
SUA Single User Account – The Prestige's SUA (Single User Account) feature allows multiple user
Internet access for the cost of a single ISP account - see also NAT.
An alternate term for cable modem.
Subscriber Unit (SU)
TCP Transmission Control Protocol handles flow control and packet recovery and IP providing basic
addressing and packet-forwarding services.
Telnet Telnet is the login and terminal emulation protocol common on the Internet and in UNIX
environments. It operates over TCP/IP networks. Its primary function is to allow users to log into
remote host systems.
Tempest
Terminal A device that allows you to send commands to a computer somewhere else. At a minimum, this
usually means a keyboard and a display screen and some simple circuitry.
Terminal Software Software that pretends to be (emulates) a physical terminal and allows you to type commands to
a computer somewhere else.
TFTP Trivial File Transfer Protocol is an Internet file transfer protocol similar to FTP (File Transfer
Protocol), but it is scaled back in functionality so that it requires fewer resources to run. TFTP
uses the UDP (User Datagram Protocol) rather than TCP (Transmission Control Protocol).
A three-way cable modem is a hybrid that can uses either a telephone modem or the TV cable for
Three-way Cable
the upstream traffic.
Modem
Trojan or Trojan Like the fabled gift to the residents of Troy, a Trojan Horse is an application designed to look
Horse innocuous. Yet, when you run the program it installs a virus or memory resident application that
can steal passwords, corrupt data, or provide hackers a back door into your computer. Trojan
applications are particularly dangerous since they can often run exactly as expected without
showing any visible signs of intrusion.
A two-way Cable Modem uses the TV cable for both downstream and upstream traffic.
Two-way Cable
Modem
UDP UDP is a connectionless transport service that dispenses with the reliability services provided by
TCP. UDP gives applications a direct interface with IP and the ability to address a particular
application process running on a host via a port number without setting up a connection session.
UNIX A widely used operating system in large networks.
The data flowing from the CM to the CMTS.
Upstream
The frequency used to transmit data from the CM to the CMTS. Normally in the 5 to 42 MHz
Upstream Frequency
range for US systems and 5 to 65 MHz range for European systems.
URL (Uniform Resource Locator) URL is an object on the Internet or an intranet that resides on a host
system. Objects include directories and an assortment of file types, including text files, graphics,
video, and audio. A URL is the address of an object that is normally typed in the Address field of
a Web browser. The URL is basically a pointer to the location of an object.
VPN Virtual Private Network. These networks use public connections (such as the Internet) to transfer
information. That information is usually encrypted for security purposes.
Vulnerability
WAN Wide Area Network s link geographically dispersed offices in other cities or around the globe.
Glossary
Illegal interception of data from computers and video signals.
Point where a system can be attacked.
Prestige 964 Cable Router
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