UPnP is a networking standard that uses protocols on the Internet to allow electronic devices connected to a network to detect and identify each other. UPnP is short for Universal Plug and Play.
When two electronic devices are connected through UPnP networking, the devices can use a shared networking language to determine each other's capabilities. As of 2014, the UPnP networking protocol is sponsored by 29 companies, one of which is Microsoft, and is open for use through the Internet. The technology behind the UPnP is promoted though the UPnP forum, which aims to make connecting devices as simple as plugging in a lamp to an electrical outlet.