|
DNS |
NIS |
NIS+ |
FNS |
LDAP |
---|---|---|---|---|---|
NAMESPACE |
Hierarchical |
Flat |
Hierarchical |
Hierarchical |
Hierarchical |
DATA STORAGE |
Files/ resource records |
2 column maps |
Multi-columned tables |
Maps |
Directories [varied] |
SERVER NAMES |
Master/slave |
Master/slave |
Root master/non-root master primary/secondary cache/stub |
N/A |
Master/replica |
SECURITY |
SSL |
None (root or nothing) |
DES Authentication |
None (root or nothing) |
SSL |
TRANSPORT |
TCP/IP |
LAN |
LAN |
LAN |
TCP/IP |
SCALE |
Global |
LAN |
LAN |
Global (w/ DNS)/LAN |
Global |