Nortel Networks NB5PLUS4/W - Manual (Page 102)

NB5Plus4/W User Guide YML754Rev1
10 www.netcomm.com.au
destination. Alternatively, the maximum number of hops
that a packet is allowed to take before being discarded ,
See also TTL.
host A device (usually a computer) connected to a network.
HTTP Hyper-Text Transfer Protocol HTTP is the main protocol
used to transfer data from web sites so that it can be
displayed by web browsers. See also web browser
ICMP Internet Control Message Protocol An Internet protocol
used to report errors and other network-related informa-
tion. The ping command makes use of ICMP.
IGMP Internet Group Management Protocol An Internet protocol
that enables a computer to share information about its
membership in multicast groups with adjacent routers.
A multicast group of computers is one whose members
have designated as interested in receiving specific con-
tent from the others. Multicasting to an IGMP group can
be used to simultaneously update the address books of
a group of mobile computer users or to send company
newsletters to a distribution list.
in­-lin­e filter See Microfilter
Internet The global collection of interconnected networks used for
both private and business communications.
intranet A private, company-internal network that looks like part
of the Internet (users access information using web
browsers), but is accessible only by employees.
IP See TCP/IP.
IP address Internet Protocol address The address of a host (com-
puter) on the Internet, consisting of four numbers, each
from 0 to 255, separated by periods, e.g., 209.191.4.240.
An IP address consists of a network ID that identifies
the particular network the host belongs to, and a host
ID uniquely identifying the host itself on that network. A
network mask is used to define the network ID and the
host ID. Because IP addresses are difficult to remember,
they usually have an associated domain name that can be
specified instead. See also domain name, network mask.
ISP Internet Service Provider A company that provides Inter-
net access to its customers, usually for a fee.
LAN Local Area Network A network limited to a small geo-
graphic area, such as a home, office, or small building.
LED Light Emitting Diode An electronic light-emitting device.
The indicator lights on the front of the My ADSL Modem
are LEDs.
MAC address Media Access Control address The permanent hardware
address of a device, assigned by its manufacturer. MAC
addresses are expressed as six pairs of characters.
mask : See network mask.