Glossary i
- IDS(intrusion
detection system)
-
A device or software that examines packets that are allowed by
a firewall, looking for things that a cracker might use to deny service or to
place a virus on a computer.
- IDS signature
-
A set of characterizations of the types of packets that
crackers have used in the past to cause viruses or to deny
service.
- IEEE (Institute of Electrical and Electronics
Engineers)
-
A standards organization that defines standards for a large
variety of topics, including computer networking (http://www.ieee.org).
- IEEE 802.1Q
-
The IEEE-defined standard VLAN trunking
protocol.
- IEEE 802.3ab
-
A name for an IEEE committee, as well as a set of standards,
relating to Gigabit Ethernet. Defines Gigabit Ethernet over copper
cabling.
- IEEE 802.3ae
-
A name for an IEEE committee, as well as a set of standards,
relating to 10 Gigabit Ethernet. Defines 10 Gigabit Ethernet over optical
cabling.
- IEEE 802.3z
-
A name for an IEEE committee, as well as a set of standards,
relating to Gigabit Ethernet. Defines Gigabit Ethernet over optical
cabling.
- IEEE Ethernet
-
Jargon referring to Ethernet standards as defined by the
IEEE.
- IETF (Internet
Engineering Task Force)
-
The standards body that creates and manages TCP/IP standards.
The IETF, to quote their website (http://www.ietf.org), is "a large, open international
community of network designers, operators, vendors, and researchers concerned
with the evolution of the Internet architecture and the smooth operation of the
Internet. It is open to any interested individual."
- IGRP (Interior
Gateway Routing Protocol)
-
An IP routing protocol, defined by Cisco, making it
proprietary.
- information
-
In the context of services provided by a telephone company,
this is the same thing as directory assistance. - See also [directory
assistance]
- inside interface
-
An interface on a firewall connected to the LAN that is
considered to be the most secure of all the LANs connected to the
firewall.
- Institute of Electrical and Electronics
Engineers (IEEE)
- See [IEEE]
- interconnected networks
- See [internetwork]
- Interior Gateway Routing Protocol (IGRP)
- See [IGRP]
- Interior Routing Protocol
-
A routing protocol designed for use inside a single company or
organization.
- internal CSU/DSU
-
A CSU/DSU integrated onto a router serial interface card, which
is then installed in a router.
- International Organization for Standardization
(ISO)
- See [ISO]
- International Telecommunication Union (ITU)
- See [ITU]
- Internet
-
The global TCP/IP network to which almost every company and
organization in the world is connected. The Internet allows communication
between a multitude of computers on the planet.
- Internet draft
-
A document that describes a protocol or standard that is under
development but not yet approved.
- Internet Engineering Task Force (IETF)
- See [IETF]
- Internet Explorer
-
The name of a popular web browser software product written by
Microsoft Corporation.
- Internet Message Format RFC
-
A TCP/IP protocol, defined in RFC 2282, that defines the
headers placed around e-mail messages when they are being sent through a
network.
- Internet Protocol (IP)
- See [IP]
- Internet service provider (ISP)
- See [ISP]
- internetwork (interconnected
networks)
-
Multiple networks that are connected using
routers.
- Inter-Switch Link (ISL)
- See [ISL]
- intrusion detection system (IDS)
- See [IDS]
- Inverse ARP
-
A process and protocol that allows a router to announce its IP
address with a message sent over a Frame Relay PVC.
- IP (Internet
Protocol)
-
A TCP/IP protocol, defined in RFC 791, that defines logical IP
addressing and routing.
- IP address
-
A 32-bit number, usually written in dotted decimal format. It
identifies a network interface on a computer to the IP protocol, and it
transmits and receives IP packets.
- IP header
-
Information that the IP protocol adds to the front of a
transport layer segment to create an IP packet. The header is typically 20 bytes
long and includes the source and destination IP
addresses.
- IP host
-
Any computer that has at least one IP
address.
- IP network
-
A grouping of IP addresses for which some initial portion of
their IP address values are in common.
- IP network number
-
A dotted-decimal number that represents a single network. The
number has the same value as the IP addresses inside the network part of the
number, and all decimal 0s in the host part of the
number.
- IP packet
-
An IP header, along with any encapsulated data after the IP
header.
- IP routing table
- See [routing
table]
- ISL (Inter-Switch Link)
-
The Cisco-proprietary VLAN trunking
protocol.
- ISO (International Organization for Standardization)
-
Organization that developed the OSI model and that continues to
work with standards today. To quote the website (http://www.iso.ch), the ISO is "a
network of national standards institutes from 147 countries working in
partnership with international organizations, governments, industry, business,
and consumer representatives. A bridge between public and private
sectors."
- ISP (Internet
service provider)
-
A company that provides a service of network connection to the
Internet. ISPs support individual users as well as
corporations.
- ITU (International Telecommunication Union)
-
A standards organization composed of telecommunications
companies from around the world. The ITU defines standards for a large variety
of topics, including telephony and wide-area networks (http://www.itu.org).
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