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GLOSSARY
ICMP (Internet Control Message Protocol) - the protocol that handles errors
and control messages at the IP layer. ICMP is actually a part of the IP protocol
layer. It can generate error messages, test packets, and informational mes-
sages related to IP.
IEEE (Institute of Electrical and Electronics Engineers) - the world’s largest
technical professional society. Based in the U.S.A., the IEEE sponsors technical
conferences, symposia & local meetings worldwide, publishes nearly 25% of
the world’s technical papers in electrical, electronics & computer engineering,
provides educational programs for its members, and promotes standardiza-
tion.
IETF (Internet Engineering Task Force) - a large, open, international commu-
nity of network designers, operators, vendors and researchers whose purpose
is to coordinate the operation, management and evolution of the Internet to
resolve short- and mid-range protocol and architectural issues.
ILMI (Interim Local Management Interface) - the standard that specifies the
use of the Simple Network Management Protocol (SNMP) and an ATM man-
agement information base (MIB) to provide network status and configuration
information.
Interface Data - the unit of information transferred to/from the upper layer
in a single interaction across a SAP. Each Interface Data Unit (IDU) controls
interface information and may also contain the whole or part of the SDU.
internet - while an internet is a network, the term “internet” is usually used to
refer to a collection of networks interconnected with routers.
Internet - (note the capital “I”) the largest internet in the world including
large national backbone nets and many regional and local networks world-
wide. The Internet uses the TCP/IP suite. Networks with only e-mail connec-
tivity are not considered on the Internet.
Internet Addresses - the numbers used to identify hosts on an internet net-
work. Internet host numbers are divided into two parts; the first is the net-
work number and the second, or local, part is a host number on that particular
network. There are also three classes of networks in the Internet, based on the
number of hosts on a given network. Large networks are classified as Class A,
having addresses in the range 1-126 and having a maximum of 16,387,064
hosts. Medium networks are classified as Class B, with addresses in the range
128-191 and with a maximum of 64,516 hosts. Small networks are classified as
Class C, having addresses in the range 192-254 with a maximum of 254 hosts.
Addresses are given as dotted decimal numbers in the following format:
nnn.nnn.nnn.nnn