To understand NSX better, we will break into its subcomponents and understand each one of the components that together make NSX. Following image shows the NXS components:
Major components of NSX are as follows:
NSX manager: NSX manager is a virtual appliance and can be installed on any ESXi host in the virtual environment managed by vCenter Server. NSX manager is the centralized management console for NSX and gives a unified collated description of the whole network. Note that NSX is no replacement for standard or distributed virtual switches, it is more of a capability extension for them. NSX makes use of Virtual Extensible LAN (VXLAN ) to span layer 2 segments inside tunnels between ESXi hosts, without using multiple stretched VLANs.
NSX vSwitch: As the name suggests, this is the virtual switch component of NSX and it bridges the gap between the virtual servers and the actual physical network hardware, allowing communication to take place smoothly.
NSX Controller: NSX controller...