Internet Activities Board. The technical body that oversees the development of the Internet suite of protocols (commonly referred to as "TCP/IP"). It has two task forces (the IRTF and the IETF) each charged with investigating a particular area.
Internet Control Message Protocol. The protocol used to handle errors and control messages at the IP layer. ICMP is actually part of the IP protocol. For instance, the IP "ping" command uses an ICMP Echo Request to see if a host can respond.
ICNP
International Conference on Network Protocols
ICPIF
Impairment/Calculated Planning Impairment Factor
IDC
Image and Design Center
IDD
Internet Data Distribution (UNIDATA)
IDEA
International Data Encryption Algorithm
IDF
Intermediate Distribution Frame, a frame rack for hanging telephone wires.
IDS
Intrusion Detection Software
IDU
InDoor Unit
IE
Internet Explorer (Microsoft)
IEC
International Electrotechnical Commission; International Engineering Consortium
IEEE
Institute of Electrical and Electronics Engineers
IEOP
Information and Education Outreach Program
IESG
Internet Engineering Steering Group. The executive committee of the IETF.
IETF
Internet Engineering Task Force. One of the task forces of the IAB. The IETF is responsible for solving short-term engineering needs of the Internet. It has over 40 Working Groups.
IFB
Invitation for Bid
IFS
IOS File System (Cisco)
IGMP
Internet Group Management Protocol
IGP
Interior Gateway Protocol. One of several protocols used to exchange routing information between collaborating routers in the Internet. RIP, IGRP and OSPF are IGPs.
IGRP
Interior Gateway Routing Protocol. A proprietary IGP used by cisco System's routers.
IITA
Information Infrastructure Technology & Applications Program
IKE
Internet Key Exchange
ILEC
Incumbent Local Exchange Carrier
ILMI
Interim Local Management Interface
IMR
Interdomain Multicast Routing
Internet address
A unique 32-bit address assigned to each host computer on the Internet. Usually represented in dotted-decimal notation, e.g 128.125.1.45. Humans have trouble remembering numbers, so names are assigned to each Internet address, and most network software uses the Domain Name System to translate the names to numbers behind the scenes. For example, the Internet address for one of NCAR's machines is128.117.8.1; its Internet name is niwot.scd.ucar.edu, and most network software allows the name niwot.scd.ucar.edu to be used, or just niwot by other machines in the scd.ucar.edu domain. Internet addresses are composed of a network part, a subnetwork part and a host part. All Internet addresses at NCAR have a network number of 128.117,
Internet
(note the capital "I") The largest internet in the world consisting of large national backbone nets (such as MILNET, NSFNET, and CREN) and a myriad of regional and local campus networks (such as WESTnet, CERFnet and SURAnet) all over the world. The Internet uses the Internet protocol suite. To be on the Internet you must have IP connectivity, i.e., be able to telnet to --or ping-- other systems. Networks with only e-mail connectivity are not actually classified as being on the Internet.
internet
A collection of networks interconnected by a set of routers which allow them to function as a single, large virtual network.
interoperate
The ability of computers from multiple vendors to work together using a common set of protocols.
IOS
Internetworking Operating System (Cisco)
IP address
See Internet address.
IP datagram
The fundamental unit of information passed across the Internet. Contains source and destination addresses along with data and a number of fields which define such things as the length of the datagram, the header checksum, and flags to say whether the datagram can be (or has been) fragmented.
IP
Internet Protocol, described in RFC 791. The network layer protocol for the Internet protocol suite.
Internetwork Packet eXchange, a protocol developed for IBM-PC compatible computers by Novell.
IrDA-SIR
IrDA Serial InfraRed
IrDA
Infrared Data Association
IRDP
ICMP Router Discovery Protocol
IRJE
Internet Remote Job Entry
IrLAP
Infrared Link Access Protocol
IrLMP
Infrared Link Management Protocol
IRTF
Internet Research Task Force. One of the task forces of the IAB. The group responsible for research and development of the Internet protocol suite.
IS-IS
Intermediate System to Intermediate System protocol. The OSI protocol by which intermediate systems exchange routing information.
IS-IS
Intermediate System-to-Intermediate System
IS-ANR
In-service, Abnormal. One of several card
states that can be reported by a "show equipment" command in an ADVA
RayExpress optical switch. "IS-ANR" indicates that a fault of some kind exists on the card.
IS-NR
In-service, Normal. One of several card
states that may be reported by a "show equipment" command in an ADVA
RayExpress optical switch. "IS-NR" is the normal "up" state.
ISAKMP/Oakley
Internet Security Association and Key Management Protocol / Oakley
iSCSI
Small Computer Systems Interface over IP
ISDN
Integrated Services Digital Network. ISDN combines voice and digital network services in a single medium making it possible to offer customers digital data services as well as voice connections through a single "wire." The standards that define ISDN are specified by CCITT.
ISL
Inter-Switch Link (Cisco)
ISM
Industry, Science, and Medicine (2.4GHz wireless band)
ISO
International Organization for Standardization. Best known for the 7-layer OSI Reference Model. See OSI.
