ZyXEL Communications 642R Series manual Udp, Url, Vci, Vpi, Wan

	Prestige 642R Series ADSL Router
	Protocol), but it is scaled back in functionality so that it requires fewer resources to run. TFTP
UDP	uses the UDP (User Datagram Protocol) rather than TCP (Transmission Control Protocol).
	User Datagram 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
URL	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
VCI	Address field of a Web browser. The URL is basically a pointer to the location of an object.
	Virtual Channel Identifier. Identifies virtual channels between users or between users and
VPI	networks.
	Virtual Path Identifier. Identifies virtual paths between users or between users and networks.
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 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 E