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. This is because the current interdomain infrastructure lacks the necessary tools to efficiently handle packet loss and the security needed to create a functional business model.