Operation Manual

Glossary
SIP Software Release 6-0-0
J613-M0524-00
109
I
ICMP Internet Control Message Protocol. The TCP/IP protocol used to handle
errors and control messages at the IP layer. ICMP is part of the IP protocol.
Gateways, routers and hosts use ICMP to send reports of problems about
datagrams back to the original source that sent the datagram.
IEEE Institute of Electrical and Electronics Engineers. A standard-making body
in the U.S. responsible for the 802 standards for local area networks.
IEEE 802.3 See 802.3.
IETF Internet Engineering Task Force. One of the task forces of the IAB
(Internet Activities Board). It is a large, open community of network
designers, operators, vendors, and researchers whose purpose is to
coordinate the operation, management and evolution of the Internet, and to
resolve short-range and mid-range protocol and architectural issues. It is a
major source of proposals for protocol standards which are submitted to the
IAB for final approval.
IGMP Internet Group Management Protocol A protocol for managing the
addition and deletion of hosts from multicast groups.
interface One of the physical ports on the router, including the Ethernet,
asynchronous and synchronous ports.
interface type The type (Ethernet, Frame relay or Point-to-Point) of one of
the interfaces on the router.
International Organisation for Standardisation See ISO.
internet A collection of networks interconnected by a set of routers which
allow them to function as a single, large virtual network.
Internet (note the capital ‘‘I’’) The largest internet in the world consisting of
large national backbone networks (such as MILNET, NSFNET, and CREN)
and a myriad of regional and local campus networks all over the world. The
Internet is a multiprotocol network, but generally carries TCP/IP.
Internet address See IP address.
Internet Protocol See IP.
interoperability The ability of software and hardware on multiple machines
from multiple vendors to communicate meaningfully.
IP Internet Protocol. The network layer protocol for the TCP/IP protocol
suite. It is a connectionless, best-effort packet switching protocol.
IP address A 32-bit address assigned to hosts using TCP/IP. The address
specifies a specific connection to a network, not the host itself. See dotted
decimal notation.