How to mirror a sql database?

Question

SQL Server

Hello, please tell me the solutions to the problem. There is a platform with servers, a terminal, 1c server, sql and AD, I'm interested in the question of how to make a second such platform to ensure fault tolerance ?. Workable options are interesting. It is clear that a very good Internet channel is needed, we have about 70-80 databases. , the weight of the largest database is 100 GB, the most interesting thing is how to make an up-to-date sql database in case the first site fails, it is clear with the rest of the server roles.

Answer 1

Windows Server Failover Cluster (WSFC) .
Or start with general questions: business continuity .