This paper provides an overview of Universal Plug and Play (UPnP) and how it works to build a digital home network. UPnP network technology allows personal computer and consumer electronics devices to advertise and offer their services to network clients. UPnP can be viewed as the technological foundation of the digital home, enabling innovative usage models, higher levels of automation, and easier integration of devices from different manufacturers. UPnP technology is all about making home networking simple and affordable for users. UPnP architecture offers pervasive peer-to-peer network connectivity of PCs of all form factors, intelligent appliances, and wireless devices. UPnP architecture leverages TCP/IP and the Web to enable seamless proximity networking in addition to control and data transfer among networked devices in the home, office, and everywhere in between. UPnP technology can be supported on essentially any operating system and works with essentially any type of physical networking media – wired or wireless – providing maximum user and developer choice and great economics.