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What is a directory?
Common-sense examples: printed (offline) directories: phone book, TV Guide
Online directories are dynamic, flexible, can be secure, can be personalized
Some different kinds of directories:
NOS-based: Novell NDS, MS Active Directory
Application-specific: Lotus Notes, MS Exchange
Purpose-specific: narrow scope, not extensible, e. ... databases:
directories have a higher read-to-write ratio
directories are more easily extended
directories are more widely distributed
directories are replicated on a higher scale
directories have very different performance characteristics
support for standards is more important in directories
Summary: "A directory is a specialized database that is read or searched far more often than it is written to.
Approximate Word count = 501 Approximate Pages = 2 (250 words per page double spaced)
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