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Terminology
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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
information. 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
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.