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.
Virtual Routing and Forwarding (VRF) In a very simple sense, a VRF provides a Layer 3 isolation mechanism within routing protocols or static routes. In the Cisco Nexus 7000 series of data center switches, the highest level of isolation mechanisms is a Virtual Device Context (VDC).