If a domain is established, configure the DNS (Domain Name Server) of the server and the DHCP function, and set the IP address of the internal network as 1 92.168.7.1~192.168,1,/kloc.
If it is a simple intranet, it is not connected to the external network. As long as it can open the required services, including DHCP function and file, printing and other service functions, each computer will be automatically assigned an address after starting, so that it can work online.