Render Node – Machine that is doing the actual rendering.
Distributed Rendering – Dividing frames to buckets and rendering them on different render nodes by using V-Ray DR spawner, V-Ray Standalone or a V-Ray RT render server.
Network Rendering – Rendering whole frames on each render node, for example by submitting jobs to job managers like Backburner.
V-Ray DR spawner – A V-Ray tool used to start V-Ray stand-alone in server mode for Distributed Rendering.
V-Ray SDK – A V-Ray Software Development Kit used for creation of custom materials and geometry.