Active Directory is a database that keeps track of all the user accounts and passwords in your organization. It allows you to store your user accounts and passwords in one protected location, improving your organization's security.
Active Directory is subdivided into one or more domains. A domain is a security boundary. Each domain is hosted by a server computer called a domain controller (DC). A domain controller manages all of the user accounts and passwords for a domain.
Domains and the Domain Name System (DNS)!
Domains are named using the Domain Name System (DNS). If your company is called Microsoft Corporation your DNS name would be (for example) microsoft.com. This is the top-level domain name for your company. The security domain in Active Directory maps directly to the DNS domain name. For larger organizations you can subdivide Active Directory into child domains (based on on geography for example). If Microsoft Corporation has three divisions named West, Central, and East, the sub-domains can have the DNS nameswest.microsoft.com, central.microsoft.com, and east.microsoft.com. Each domain requires a server computer. In the above scenario you would need at least four servers to host Active Directory as follows:
microsoft.com
east.microsoft.com
central.microsoft.com
west.microsoft.com
Active Directory is subdivided into one or more domains. A domain is a security boundary. Each domain is hosted by a server computer called a domain controller (DC). A domain controller manages all of the user accounts and passwords for a domain.
Domains and the Domain Name System (DNS)!
Domains are named using the Domain Name System (DNS). If your company is called Microsoft Corporation your DNS name would be (for example) microsoft.com. This is the top-level domain name for your company. The security domain in Active Directory maps directly to the DNS domain name. For larger organizations you can subdivide Active Directory into child domains (based on on geography for example). If Microsoft Corporation has three divisions named West, Central, and East, the sub-domains can have the DNS nameswest.microsoft.com, central.microsoft.com, and east.microsoft.com. Each domain requires a server computer. In the above scenario you would need at least four servers to host Active Directory as follows:
microsoft.com
east.microsoft.com
central.microsoft.com
west.microsoft.com
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