ZyXEL Communications P-334WT Support Notes page 95

Using UPnP
1. What is UPnP
2. Use UPnP in ZyXEL devices
3. View dynamic ports opened by UPnP
1. What is UPnP
UPnP (Universal Plug and Play) makes connecting PCs of all form factors, intelligent appliances, and wireless devices in the home, office, and everywhere in between
easier and even automatic by leveraging TCP/IP and Web technologies. UPnP can be supported on essentially any operating system and works with essentially any type of
physical networking media ¡V wired or wireless.
UPnP also supports NAT Traversal which can automatically solve many NAT unfriendly problems. By UPnP, applications assign the dynamic port mappings to Internet
gateway and delete the mappings when the connections are complete.
The key components in UPnP are devices, services, and control points.
Devices: Network devices, such as networking gateways, TV, refrigerators, printers...etc, which provides services.
Services: Services are provided by devices, such as time services provided by alarm clocks. In UPnP, services are described in XML format. Control points can set/
get services information from devices.
Control points: Control points can manipulate network devices When you add a new control point (in this case, a laptop) to a network, the device may ask the
network to find UPnP-enabled devices. These devices respond with their URLs and device descriptions.