NonStop System Glossary

CBB

See common base board (CBB).

CCITT

International Telegraph and Telephone Consultative Committee.

CCSA

See Common Communication ServerNet adapter (CCSA).

Customer engineer. See service provider.

cell

See storage pool.

central processing unit (CPU)

Historically, the main data processing unit of a computer. NonStop servers have multiple cooperating

processors rather than a single CPU. See also processor.

certificate authority (CA)

A trusted third party that provides digital certificates for encrypted data communications.

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 Notification Director for OSM and TSM uses

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.