Houses information about all network resources:
- Servers, printers, user accounts, groups of user accounts, security policies, and other information
- Central listing of network resources
- Quick access to network resources
Domain controllers (DCs)
- Servers that have the AD DS server role installed
- A Domain can have multiple DCs for Fault Tolerance and Load Balancing
Member servers
Do not have AD installed (therefore they are not DCs)
Domain
- Fundamental component or container
- Holds information about all network resources that are grouped within the domain (ie, all user accounts in the domain and all LAN Printers)
- Each DC is equal to every other DC
- Each DC has a full list of all networks resources in the domain
- Object defined in the DC are replicated between DCs
- The volume of information to be replicated can be limited if required. This is a good option for slow links
- Advantage : If one DC goes down, no network interruption
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