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.
Visual Reinforcement Audiometry (VRA) VRA is a method of performing puretone audiometry that is used with children from about six months to 30 months of age. Visual reinforcement audiometry is the method of choice for screening children between 6 months and 2 years of age.