Architecting a VMware NSX Solution : Design Considerations : 4.5 NSX Manager
   
4.5 NSX Manager
NSX Manager is the management component for NSX for vSphere and is typically located in the management cluster. The key functions of the NSX Manager are:
Deployment and management of the controller cluster
Preparation of the vSphere ESXi hosts (installation of the VIBs)
Deployment of the edge services gateways and associated services (firewall, NAT, routing, and so on)
Acts as the target for NSX REST API calls