What is the difference between a unicast, multicast, broadcast, and anycast transmission?

What will be an ideal response?

A unicast is a transmission in which one packet is sent from a server to each client that requests a file or application, such as a video presentation. Thus, if five clients request the video presentation, the server sends five packets per each transmission to the five clients. In the same example, a multicast means that the server is able to treat all five clients as a group and send one packet per transmission that reaches all five clients. A broadcast sends communication to all points on a specific network, with routers often being the boundaries of those broadcasts. An anycast packet is an IPv6 packet that contains a destination address that is associated with multiple interfaces, usually on different nodes. The anycast packet goes only to the closest interface and does not attempt to reach the other interfaces with the same address.