The Simple Service Discovery Protocol (SSDP) provides a mechanism where by network clients, with little or no static configuration, can discover network services. SSDP accomplishes this by providing for multicast discovery support as well as server based notification and discovery routing.
SSDP is a text-based protocol based on HTTPU. It uses the User Datagram Protocol (UDP) as the underlying transport protocol. Services are announced by the hosting system with multicast addressing to a specifically designated IP multicast address at UDP port number 1900. In IPv4, the multicast address is 188.8.131.52 and SSDP over IPv6 uses the address set ff0X::c for all scope ranges indicated by X. Read more