Netcom NB9W manual Tcp/Ip, Tftp, Ttl, Usb, Vci, Vpi, Wan

splitterless	A type of DSL installation where no splitter is installed, saving the cost of a service call by the telephone company.
	Instead, each jack in the home carries both voice and data, requiring a microfilter for each telephone to prevent
	interference from the data signal. ADSL is usually splitterless; if you are unsure if your installation has a splitter, ask
	your DSL provider. See also splitter, microfilter.
subnet	A subnet is a portion of a network. The subnet is distinguished from the larger network by a subnet mask which selects
	some of the computers of the network and excludes all others. The subnet’s computers remain physically connected
	to the rest of the parent network, but they are treated as though they were on a separate network. See also network
	mask.
subnet mask	A mask that defines a subnet. See also network mask.
TCP	See TCP/IP.
TCP/IP	Transmission Control Protocol/Internet Protocol The basic protocols used on the Internet. TCP is responsible for dividing
	data up into packets for delivery and reassembling them at the destination, while IP is responsible for delivering the
	packets from source to destination. When TCP and IP are bundled with higher-level applications such as HTTP, FTP,
	Telnet, etc., TCP/IP refers to this whole suite of protocols.
Telnet	An interactive, character-based program used to access a remote computer. While HTTP (the web protocol) and FTP
	only allow you to download files from a remote computer, Telnet allows you to log into and use a computer from a
	remote location.
TFTP	Trivial File Transfer Protocol. A protocol for file transfers, TFTP is easier to use than File Transfer Protocol (FTP) but not
	as capable or secure.
TTL	Time To Live A field in an IP packet that limits the life span of that packet. Originally meant as a time duration, the TTL
	is usually represented instead as a maximum hop count; each router that receives a packet decrements this field by
	one. When the TTL reaches zero, the packet is discarded.
twisted pair	The ordinary copper telephone wiring long used by telephone companies. It contains one or more wire pairs twisted
	together to reduce inductance and noise. Each telephone line uses one pair. In homes, it is most often installed with
	two pairs. For Ethernet LANs, a higher grade called Category 3 (CAT 3) is used for 10BASE-T networks, and an even
	higher grade called Category 5 (CAT 5) is used for 100BASE-T networks. See also 10BASE-T, 100BASE-T, Ethernet.
upstream	The direction of data transmission from the user to the Internet.
USB	Universal Serial Bus A serial interface that lets you connect devices such as printers, scanners, etc. to your computer
	by simply plugging them in. The My ADSL Modem is equipped with a USB interface for connecting to a stand-alone PC.
VC	Virtual Circuit A connection from your ADSL router to your ISP.
VCI	Virtual Circuit Identifier Together with the Virtual Path Identifier (VPI), the VCI uniquely identifies a VC. Your ISP will tell
	you the VCI for each VC they provide. See also VC.
VPI	Virtual Path Identifier Together with the Virtual Circuit Identifier (VCI), the VPI uniquely identifies a VC. Your ISP will tell
	you the VPI for each VC they provide. See also VC.
WAN	Wide Area Network Any network spread over a large geographical area, such as a country or continent. With respect to
	the My ADSL Modem, WAN refers to the Internet.
Web browser	A software program that uses Hyper-Text Transfer Protocol (HTTP) to download information from (and upload to)
	web sites, and displays the information, which may consist of text, graphic images, audio, or video, to the user. Web
	browsers use Hyper-Text Transfer Protocol (HTTP). Popular web browsers include Netscape Navigator and Microsoft
	Internet Explorer. See also HTTP, web site, WWW.
Web page	A web site file typically containing text, graphics and hyperlinks (cross-references) to the other pages on that web site,
	as well as to pages on other web sites. When a user accesses a web site, the first page that is displayed is called the
	Home page. See also hyperlink, web site.
Web site	A computer on the Internet that distributes information to (and gets information from) remote users through web
	browsers. A web site typically consists of web pages that contain text, graphics, and hyperlinks. See also hyperlink,
	web page.

WWWWorld Wide Web Also called (the) Web. Collective term for all web sites anywhere in the world that can be accessed via the Internet.

NB9/NB9W ADSL2+ VoIP Router 79

YML790 Rev8