The Ports tab displays a list of the current port service mappings, and lets you enable or disable UPnP port forwarding. To enable or disable UPnP port forwarding: Set UPnP port forwarding to ON to allow UPnP devices on your Fiber network to set their own port forwarding rules.
VRML (Virtual Reality Modeling Language) is a language for describing three-dimensional (3-D) image sequences and possible user interactions to go with them.
VRS Stands for Virtual ReScan. This is a software that allows one to scan a document and. adjust the image quality on the fly by using a slide bar to render the image exactly what one would like to save, without having to change the settings then rescan the document with the new settings. VRS has many more features, but that is the principle of VRS.