Nortel Networks NB5PLUS4/W manual Dsl, Ftp, Ggp, Gre

domain­ n­ame	A domain name is a user-friendly name used in place of
	its associated IP address. For example, www.globespan.
	net is the domain name associated with IP address
	209.191.4.240. Domain names must be unique; their
	assignment is controlled by the Internet Corporation for
	Assigned Names and Numbers (ICANN). Domain names
	are a key element of URLs, which identify a specific file at
	a web site, e.g., http://www.globespan.net/index.html.
	See also DNS.
download	To transfer data in the downstream direction, i.e., from
	the Internet to the user.
DSL	Digital Subscriber Line A technology that allows both dig-
	ital data and analog voice signals to travel over existing
	copper telephone lines.
Ethern­et	The most commonly installed computer network technol-
	ogy, usually using twisted pair wiring. Ethernet data rates
	are 10 Mbps and 100 Mbps. See also BASE-T,100BASE-T,
	twisted pair.
Filtering	To screen out selected types of data, based on filtering
	rules. Filtering can be applied in one direction (upstream
	or downstream), or in both directions.
filteringg­ rule	A rule that specifies what kinds of data a routing device
	will accept and/or reject. Filtering rules are defined to
	operate on an interface (or multiple interfaces) and in a
	particular direction (upstream, downstream, or both).
Firewall	Any method of protecting a computer or LAN connected
	to the Internet from intrusion or attack from the outside.
	Some firewall protection can be provided by packet filter-
	ing and Network Address Translation services.
FTP	File Transfer Protocol - A program used to transfer files
	between computers connected to the Internet. Common
	uses include uploading new or updated files to a web
	server, and downloading files from a web server.
GGP	Gateway to Gateway Protocol. An Internet protocol that
	specifies how gateway routers communicate with each
	other.
Gbps	Abbreviation for Gigabits (GIG-uh-bits) per second, or
	one billion bits per second. Internet data rates are often
	expressed in Gbps.
GRE	Generic Routing Encapsulation. TCP/IP protocol suite,
	transport layer encapsulation protocol.
hop	When you send data through the Internet, it is sent first
	from your computer to a router, and then from one router
	to another until it finally reaches a router that is directly
	connected to the recipient. Each individual “leg” of the
	data’s journey is called a hop.
hop coun­t	The number of hops that data has taken on its route to its

YML754 Rev1	NB5Plus4/W User Guide
www.netcomm.com.au	101