Define the different kinds of casting

Firstly, there is unicasting, which refers to one-on-one communication. Multicasting, on the other hand, means a one-to-many chain of communication. In multicasting, however, there must be at least one device that is not receiving the file. Broadcasting, on the other hand, means one-to-all communication. In case of broadcasting, every device receives packets. Lastly, anycast is one-to-nearest communication. It works on IPv6.