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Naming Services: A Quick Comparison
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DNS |
NIS |
NIS+ |
LDAP |
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NAMESPACE |
Hierarchical |
Flat |
Hierarchical |
Hierarchical |
DATA STORAGE |
Files/ resource records |
2 column maps |
Multi-columned tables |
Directories [varied] |
SERVER NAMES |
Master/slave |
Master/slave |
Root master/non-root master primary/secondary
cache/stub |
Master/replica |
SECURITY |
None |
None (root or nothing) |
Secure RPC (AUTH_DH) Authentication |
SSL, varied |
TRANSPORT |
TCP/IP |
RPC |
RPC |
TCP/IP |
SCALE |
Global |
LAN |
LAN |
Global |
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