03-24-2010, 07:33 PM
Ok the document you linked states specifically that:
IGMP (on a router) sends out periodic general IGMP queries. Therefore it does operate on a layer 3 router. That statement is true. The statement that IGMP is a routing protocol is false. It is a communications protocol. It does not route traffic but instead it allows hosts to subscribe to multicasts by sending requests at Layer 2.
IGMP (on a router) sends out periodic general IGMP queries. Therefore it does operate on a layer 3 router. That statement is true. The statement that IGMP is a routing protocol is false. It is a communications protocol. It does not route traffic but instead it allows hosts to subscribe to multicasts by sending requests at Layer 2.