NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-12
Challenge Handshake Authentication Protocol
(CHAP)
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 Directors 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 holds all the other components of an enclosure.
See also enclosure.
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.
CIIN. A command file in the SYSnn subvolume that is read and executed by the startup HP
Tandem Advanced Command Language (TACL) process after system load if the CIIN
file is specified in the CONFTEXT file and enabled in the OSM or TSM Low-Level Link.
circuit breaker. A device designed to open and close a circuit by nonautomatic means and
to open the circuit automatically on a predetermined overcurrent without damage to
itself.
CISC compiler. See TNS compiler.