Final answer:
To configure an alternate DNS server for a domain controller, use the command netsh interface ip add dns, with the correct option being 'A. Add dns'. Replace 'ip_address_of_alternate_dns_server' with the actual IP address of the DNS server.
Step-by-step explanation:
The command to configure a domain controller to use an alternate DNS server in Windows using netsh is completed as follows:
netsh interface ip set dns name="Ethernet" source=static addr=none register=primary
netsh interface ip add dns name="Ethernet" addr="ip_address_of_alternate_dns_server" index=2
The correct option to complete the command is A. Add dns, since we're adding an additional DNS server address to the network interface named Ethernet. Remember to replace ip_address_of_alternate_dns_server with the actual IP address of the alternate DNS server you wish to configure.
Ethernet is widely used in homes, businesses, and data centers for its reliability, speed, and stability in connecting devices within a network. It provides a foundation for local area networks and is fundamental to internet connectivity for many users worldwide.