Fast Ethernet Adapter Installation and Support Guide

Glossary
Fast Ethernet Adapter Installation and Support Guide—425685-003
Glossary-48
Internet protocol (IP)
implementation. The ICMP allows two nodes on an IP network to share IP status and
error information. The ICMP is used by the ping utility to determine the readability of a
remote system. See also IP address and ping.
Internet protocol (IP). A data communications protocol that handles the routing of data
through a network, which typically consists of many different subnetworks. IP is
connectionless; it routes data from a source address to a destination address. See also
IP address.
interoperability. (1) Within an HP NonStop™ node, the ability to use the features or
facilities of one environment from another. For example, the gtacl command in the
Open System Services (OSS) environment allows an interactive user to start and use a
Guardian tool in the Guardian environment. (2) Among systems from multiple vendors
or with multiple versions of operating systems from the same vendor, the ability to
exchange status, files, and other information. Product externals and end-user
publications for the NonStop range of servers often use the term “connectivity” in this
context. See also connectivity.
interprocessor communications (IPC). The exchange of messages between processors.
intrinsic library. See Shared Millicode Library.
instance. A particular case of a class of items or objects. For example, a process is defined
as one instance of the execution of a program; multiple processes might be executing
the same program simultaneously. Also, instance data refers to global data of a
program or library; each process has a its own instance of these data.
instance data. For each process using a dynamic-link library, a data segment area
containing the global variables used by the library.
I/O cabinet. See I/O enclosure.
I/O controller. The hardware logic that controls computer I/O operations for a particular set
of devices, such as disks, tapes, terminals, or communications lines. See also
ServerNet addressable controller (SAC).
I/O enclosure. An HP NonStop™ S-series system enclosure containing exactly one
module, which includes ServerNet adapters, disk drives, components related to the
ServerNet fabrics, and components related to electrical power and cooling for the
enclosure. An I/O enclosure is identical to a processor enclosure, except that it
contains I/O multifunction (IOMF) customer-replaceable units (CRUs) instead of
processor multifunction (PMF) CRUs.
IOMF CRU. See I/O multifunction (IOMF) CRU.
IOMF 2 CRU. See I/O multifunction (IOMF) 2 CRU.
I/O multifunction (IOMF) CRU. (1) An HP NonStop™ S-series customer-replaceable unit
(CRU) that connects an I/O enclosure to a processor enclosure through a ServerNet