ZyXEL Communications Prestige 645R User Manual page 161

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).
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.
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.
VCI A Virtual Channel Identifier is a number that denotes a particular logical connection between
end stations (users or networks). See also, VPI.
VPI A Virtual Path Identifier is a number that denotes a bundle of virtual channels. See also VCI.
WAN Wide Area Networks 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.
WWW (World Wide Web) -- Frequently used (incorrectly) 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
Prestige 645 ADSL Internet Access Router
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