Active Directory Domain Services uses DNS to locate domain controllers for various operations.

Active Directory Domain Services uses DNS to locate domain controllers for various operations.

• A. Active Directory Domain Services uses DNS to locate domain controllers for various operations
• B. Active Directory Domain Services uses LDAP to locate domain controllers
• C. Active Directory Domain Services uses DHCP to locate domain controllers
• D. Active Directory Domain Services uses FTP to locate domain controllers

Answer: (A)

DNS is how Active Directory locates domain controllers for authentication and directory services. Domain controllers publish service location records in DNS that describe where to reach LDAP and Kerberos services for the domain. When a client needs to find a DC, it queries DNS for the appropriate SRV records, such as _ldap._tcp.dc._msdcs.<domain> and _kerberos._tcp.dc._msdcs.<domain>, which specify the DC’s hostname and port. The client then connects to that DC to perform authentication and directory operations. This DNS-based discovery is essential—without DNS integration, the domain controllers cannot be found and authentication would fail. LDAP is the protocol used after discovery to talk to the DC, not the mechanism for locating it; DHCP and FTP serve unrelated functions and are not used to locate domain controllers.

DNS is how Active Directory locates domain controllers for authentication and directory services. Domain controllers publish service location records in DNS that describe where to reach LDAP and Kerberos services for the domain. When a client needs to find a DC, it queries DNS for the appropriate SRV records, such as _ldap._tcp.dc._msdcs. and _kerberos._tcp.dc._msdcs., which specify the DC’s hostname and port. The client then connects to that DC to perform authentication and directory operations. This DNS-based discovery is essential—without DNS integration, the domain controllers cannot be found and authentication would fail. LDAP is the protocol used after discovery to talk to the DC, not the mechanism for locating it; DHCP and FTP serve unrelated functions and are not used to locate domain controllers.