Advantages and disadvantages with DPM regarding SQL Server

I have some questions regarding DPM for SQL Server.

1. Does anyone know how DPM (Data protection management) in System Center works with SQL Server (how does it backup data)?
2. What are the advantages/disadvantages of DPM?
3. Does it mirror or replicate a SQL Server database?
4. Why/why not should one chose DPM for SQL Server?
5. I've read somewhere that it isn't a single point of failure, could someone explain that further?
6. What is the difference between DPM and AlwaysOn Availability Groups regarding disaster recovery and when one wants to achieve zero data loss?

Would be thankful if someone could help me!