Broadcast, Unicast, and Multicast Addressing
Information can get to systems through three types of addresses: unicast, multicast, and broadcast. Each type of address is used according to the purpose of the information being sent, as explained here:
• Unicast—Sends information to one specific host. Unicast addresses are used for Telnet, FTP, SSH, or any other information that needs to be shared in a one-to-one exchange of information. Although it is possible that any host on the subnet/network can see the information being passed, only one host is the intended recipient and will take action on the information being received.
• Multicasting—Broadcasts information to groups of computers sharing an application, such as a video conferencing client ...
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