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.
Information-Centric Networking. With ICN, the principal communication paradigm is no longer end-to-end data delivery between hosts. Instead,
ICN architectures aim to securely retrieve content by name, independent of where the content is located. Dan Massey of CSU is working on the
The ICSI Netalyzer is a free, web-based program that wil analyze your network
Inter-Domain Controller, a machine that is part of the set of equipment deployed to a DYNES site. The IDC creates dynamic VLANs between
the local DYNES FDT server and local and remote networks. The IDC runs the DCN software suite, which consists of OSCARS and DRAGON
Institute of Electrical and Electronics Engineers. The NCAR Library has an institutional membership to the
IEEE, which means that NCAR employees can access IEEE Xplore, their online archive. NCAR bought an online "file cabinet", which can
hold about 3500 IEEE articles. To search Xplore, go to the NCAR Library, then "Abstracts", then
"IEEE Xplore". Search for articles and then select "FULL-TEXT PDF" to copy files to the NCAR "file cabinet", from which they can
Information and Education Outreach Program
International Extension and Public Alert System, a JOSS program that undertakes projects to improve
rural and remote communication of meteorological information. Primary support for the program is provided by the USAID Office of Foreign Disaster
Assistance (OFDA), provided through an inter-agency agreement with the NOAA National Weather Service (NWS) International Activities Office (IAO).
IEPAS focuses primarily on development of communication tools, training, and management of technology. The program works in parts of Africa,
Asia, Pacific, and Central America and Caribbean.
Internet Engineering Steering Group. The executive committee of the 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.
Internet Message Access Protocol, a protocol for email retrieval. IMAP is an alternative to POP.
Interdomain Multicast Routing
InCommon is a part of Internet2 that provides a federated identity management, so that you can use
your incommon username/password to provide single-sign-on to various resources.
(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.
A collection of networks interconnected by a set of routers which allow them to function as a single, large virtual network.
A unique 32-bit address assigned to each host computer on the Internet. Usually represented in dotted-decimal notation, e.g 188.8.131.52.
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 is 184.108.40.206 and 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,
The ability of computers from multiple vendors to work together using a common set of protocols.
coalescing is a mechanism by which a NIC card sends an interrupt to the CPU for a group of packets, instead of one interrupt for every packet
that is received.
ion is a virtual circuit service offered by Internet2.
Internetworking Operating System, the software that runs on Cisco routers and switches. Newer Nexus series Cisco devices run NX-OS instead of
The network layer protocol for the Internet protocol suite, described in RFC
See Internet address.
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)
Internet Research Task Force. One of the task forces of the IAB. The group responsible for research and development of the Internet protocol
Indefeasible right of use, a contractual agreement between the operators of a communications cable and a client. Indefeasible means the cable
owner cannot revoke the right to use the cable before the contract expires.
In-service. One of several card states that can be reported by a "show equipment" command in an ADVA RayExpress optical switch.
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.
Intermediate System to Intermediate System protocol. The OSI protocol by which intermediate systems exchange routing information.
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.
Internet Security Association and Key Management Protocol / Oakley
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.
Industry Standard Discovery Protocol is the name Dell gave to CDP on Dell's switches. Dell didn't want to call it CDP, but it's CDP.