We started this chapter with an introduction to network virtualization and software-defined networking. We discussed the concepts of network virtualization and introduced VMware's NSX network virtualization platform. We then discussed different NSX features and services, including logical switching, logical routing, Edge gateway services, extensibility, service composer, and data security. We also briefly discussed the multi-vCenter NSX feature. We ended the chapter with configuration maximums for NSX. In Chapter 2,  NSX Core Components, we will look at the different components of NSX and VXLAN.