NonStop S-Series System Expansion and Reduction Guide

Glossary
G-Series Common Glossary
Glossary-11
CE
CE. Customer engineer. See service provider.
cell. See storage pool.
central processing unit (CPU). Historically, the main data processing unit of a computer.
The HP NonStop™ servers have multiple cooperating processors rather than a single
CPU. See also processor
.
Challenge Handshake Authentication Protocol (CHAP). An Internet-standard protocol for
verifying encrypted passwords. CHAP is a security protocol that is implemented using
Point-to-Point Protocol (PPP)
. The OSM and TSM Notification Director use CHAP to
maintain security during dial-outs.
channel. An information route for data transmission. See also ServerNet link.
CHAP. See Challenge Handshake Authentication Protocol (CHAP).
character. A sequence of one or more bytes representing a single character; used for the
organization, representation, or control of data. A single-byte character consists of
eight bits that represent a character. A multibyte character uses one or more bytes to
represent a character. A wide character is a fixed-width character wide enough to hold
any coded character supported by an implementation.
The ISO C standard defines the term multibyte character; a single-byte character is a
special case of multibyte character.
character set. A finite set of characters (letters, digits, symbols, ideographs, or control
functions) used for the organization, representation, or control of data. See also code
set.
character special file. In the Open System Services (OSS) environment, a device that is
treated as a file for which all input or output must occur in character bytes. Traditionally,
such files are interactive terminals, and the ISO/IEC IS 9945-1:1990 standard defines
only the access to such terminal files. See also terminal
. Contrast with block special
file.
chassis. A single sheet-metal structure that houses one set of system components. In an
HP NonStop S-series server, a chassis is part of a system enclosure but can also be
mounted in any standard 19-inch rack.
checksum. A generic term, meaning to add together (although the definition of add need
not be a normal arithmetic add) all of the data to produce a check
word. See also cyclic
redundancy check (CRC).
child process. A process created by another process. The creating process becomes the
parent process of the new process. See also parent process
.