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IP Multicasting is a communication mechanism in which data is communicated from a server to a set of clients who are interested in receiving data.Multicast Ip range is - 224.0.0.0 - 239.255.255.255
the difference between totally stubby and NSSA is that the totally stubby area doesn't allow any summary routes from other areas, and no external routes. Instead it receives a default route from the area border router. The NSSA is basically the same ...
