Prestige 642 PPPoE Modem

Software

 

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).

 

 

 

 

 

Twisted Pair

 

Two insulated wires, usually copper, twisted together and often bound into a common

 

 

 

sheath to form multi-pair cables. In ISDN, the cables are the basic path between a

 

 

 

subscriber's terminal or telephone and the PBX or the central office.

 

 

 

 

 

UDP

 

User Datagram Protocol. DP is a connectionless transport service that dispenses with

 

 

 

the reliability services provided by TCP. UDP gives applications a direct interface with

 

 

 

the Internet Protocol (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. A URL is basically a pointer to the

 

 

 

location of an object.

 

 

 

 

 

VC-based

 

By prior mutual agreement, each protocol is assigned to a specific virtual circuit, eg.,

 

Multiplexing

 

VCI carries IP, VC2 carries IPX, etc. VC-based multiplexing may be dominant in

 

 

 

environments where dynamic creation of large numbers of ATM VCs is fast and

 

 

 

economical.

 

 

 

 

 

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.

 

 

 

 

 

VPN

 

Virtual Private Network. These networks use public connections (such as the Internet)

 

 

 

to transfer information. That information is usually encrypted for security purposes.

 

 

 

 

 

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.

 

WWWWorld Wide Web. Frequently used (incorrectly) when referring to "The Internet". WWW has two major definitions. One, the whole constellation of resources that can be accessed using Gopher, FTP, HTTP, telnet, USENET, WAIS and other tools. Two, the universe of hypertext servers (HTTP servers).

xDSL

 

Digital Subscriber Line(s) where x, when specified, denotes a particular flavor of DSL,

 

 

eg., ADSL, G.SHDSL, SDSL, VDSL, RDSL, etc.

 

 

 

H

Glossary