ZyXEL Communications Prestige 1600 Configuration Manual page 158

Prestige 1600 Universal Access Concentrator
Terminal
Terminal Software
TFTP
UDP
URL
Virtual Connection
(VC)
WAN
WWW
N
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.
Software that pretends to be (emulates) a physical terminal and allows you to type commands to
a computer somewhere else.
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).
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.
(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.
A link that seems and behaves like a dedicated point-to-point line or a system that delivers
packets in sequence, as happens on an actual point-to-point network. In reality, the data is
delivered across a network via the most appropriate route. The sending and receiving devices
do not have to be aware of the options and the route is chosen only when a message is sent.
There is no pre-arrangement, so each virtual connection exists only for the duration of that one
transmission.
Wide Area Network s link geographically dispersed offices in other cities or around the globe.
Just about any long-distance communication medium can serve as a WAN link, including
switched and permanent telephone circuits, terrestrial radio systems and satellite systems.
(World Wide Web) - Frequently used when referring to "The Internet", WWW has two major
meanings - First, loosely used: the whole constellation of resources that can be accessed using
Gopher, FTP, HTTP, telnet, USENET, WAIS and some other tools. Second, the universe of
hypertext servers (HTTP servers).
Glossary