beautypg.com

Sun Microsystems Sun Fire X4200 User Manual

Page 186

background image

Glossary-14

Sun Fire X4100 and Sun Fire X4200 Servers System Management Guide • December 2005

Network Time Protocol

(NTP)

An Internet standard for Transmission Control Protocol/Internet Protocol
(TCP/IP) networks. NTP synchronizes the clock times of networked devices
with NTP servers to the millisecond using Coordinated Universal Time (UTC).

node

An addressable point or device on a network. A node can connect a computing
system, a terminal, or various peripheral devices to the network.

nonmaskable interrupt

(NMI)

A system interrupt that is not invalidated by another interrupt.

nonvolatile memory

A type of memory that ensures that data is not lost when system power is off.

nonvolatile random-

access memory

(NVRAM)

A type of random-access memory (RAM) that retains information when system
power is off.

O

object identifier

(OID)

A number that identifies an object’s position in a global object registration tree.
Each node of the tree is assigned a number, so that an OID is a sequence of
numbers. In Internet usage the OID numbers are delimited by dots, for
example, “0.128.45.12.” In the Lightweight Directory Access Protocol (LDAP),
OIDs are used to uniquely identify schema elements, including object classes
and attribute types.

OpenBoot PROM

A layer of software that takes control of an initialized system after the power-
on self-test (POST) successfully tests components. OpenBoot PROM builds
data structures in memory and boots the operating system.

OpenIPMI

An operating system-independent, event-driven library for simplifying access
to the Intelligent Platform Management Interface (IPMI).

Operator

A user with limited privileges to the managed host system.

out-of-band (OOB)

system management

Server management capability that is enabled when the operating system
network drivers or the server are not functioning properly.