A new business has contracted you to install their network, servers, and clients. There are 25 client computers. You have determined that the business will be domain-based and should use Active Directory for centralized sign-ins and policies. Other services include DHCP, DNS, file and printer sharing and a database. You estimate the business will initially require two servers running Windows Server 2019 and another that runs Linux for the database. You have installed the first Windows server and installed Active Directory, DNS, and DHCP. What role should the second server play in the network?