Naming Services: A Quick Comparison
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Namespace
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Hierarchical
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Flat
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Hierarchical
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Files
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Data Storage
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Files/resource records
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Two column maps
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Directories (varied)
Indexed database
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Text-based files
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Servers
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Master/slave
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Master/slave
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Master/replica
Multi master replica
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None
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Security
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DNSSEC, varied
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None (root or nothing)
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Kerberos, TLS, SSL, varied
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None
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Transport
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TCP/IP
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RPC
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TCP/IP
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File I/O
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Scale
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Global
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LAN
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Global
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Local host only
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Data
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Host
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All
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All
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All
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Note -
DNS is the recommended service for host or network address lookups for LDAP and files-based
naming.