Red Hat DIRECTORY SERVER 7.1, Installation Manual

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68 Glossary
certificate
A collection of data that associates the public keys of a network user with their DN in the direc-
tory. The certificate is stored in the directory as user object attributes.
Certificate Authority
Company or organization that sells and issues authentication certificates. You may purchase an
authentication certificate from a Certification Auth
CGI
Common Gateway Interface. An interface for external programs to communicate with the HTTP
server. Programs written to use CGI are called CGI programs or CGI scripts and can be written
in many of the common programming languages. CGI programs handle forms or perform output
parsing that is not done by the server itself.
chaining
A method for relaying requests to another server. Results for the request are collected, compiled,
and then returned to the client.
changelog
A changelog is a record that describes the modifications that have occurred on a replica. The
supplier server then replays these modifications on the replicas stored on consumer servers or on
other masters, in the case of multi-master replication.
character type
Distinguishes alphabetic characters from numeric or other characters and the mapping of upper-
case to lower-case letters.
ciphertext
Encrypted information that cannot be read by anyone without the proper key to decrypt the
information.
CIR
See consumer-initiated replication .
class definition
Specifies the information needed to create an instance of a particular object and determines how
the object works in relation to other objects in the directory.