IP multicast supports efficient content distribution.
IP multicast is implemented in Funet backbone. For using the service multicast must be supported in your local network.
Funet participates in inter-domain multicast routing and is connected to other academic networks and communities as Internet2 via NORDUnet and Géant2.
CSC implements addressing allocation policy according to Nordunet and TERENA guidelines.
More information about multicast can be found from Wikipedia.