I think that definition is way to narrow, the management in DBMS refers to managing the data, keeping it consistent, laying it out on disk and in memory, readin

I think that definition is way to narrow, the management in DBMS refers to managing the data, keeping it consistent, laying it out on disk and in memory, reading, updating and deleting it. To address the things you named, DBMSs are not required to support backups or replication, authentication and logging happens during actions you initiate.