A customer wants to add the capability for source-based deduplication to their current EMC NetWorker environment. Their backup environment consists of two separate NetWorker servers and four storage…

A customer wants to add the capability for source-based deduplication to their current EMC NetWorker environment. Their backup environment consists of two separate NetWorker servers and four storage nodes. One NetWorker server and two storage nodes protect their UNIX environment. The other NetWorker server and two storage nodes protect the Microsoft Windows environment. What is the minimum number of Avamar servers that are required to protect both environments?