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Domains are used in network infrastructure to group computers and other network devices for ease of administration.
Within a domain, the Domain Controller is used to centrally authenticate and authorize users as well as store account information rather than separately on each machine.
A Domain Controller is a computer server that handles security authentication requests within a computer network domain.
It is a network server that is in charge of granting hosts access to domain resources. It authenticates users, saves user account information, and enforces a domain's security policies.
Domain Controllers limit access to domain resources by verifying user identity via login credentials and preventing illegal access to those resources.
Domain Controllers enforce security restrictions on requests for domain resource access.
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