SSDP is the basis of the discovery protocol of Universal plug-and-play.
SSDP provides a mechanism which network clients can use to discover network services. Clients can use SSDP with little or no static configuration.
SSDP uses UDP unicast and multicast packets to advertise available services. The multicast address used is 126.96.36.199 in IPv4. SSDP over IPv6 uses the following multicast addresses, depending on scope