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Terminology
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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 content 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 (computer) 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.