IP Multicast Routing Part One.
Concepts explained inside are : Internet Multicast Backbone, Multicast Addressing and Mapping, Multicast: How it works, IGMP v1,v2,v3 and more.
Note: All slides care of a more detailed explanation about the concepts involved. If you need just that, send me a message and I'll reply with a pdf document with just that. All explanations are in English or/and Portuguese.
Thanks, Pedro Almeida.