sentences:  See the article on multicast for a general discussion of this subject - this article is specifically about SMART IP Multicast.IP Multicast has been successfully deployed in private and controlled networking environments, for example; IP over fiber - cable TV operators, educational institutions with significant on-campus student housing and financial sector applications such as stock tickers and hoot-n-holler systems.However, IP multicast has been slow to be adopted in the interdomain routing environment.