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								        Explain why use Multicasting.- When the same message or packet needs to be sent to multiple destinations, multicasting is used.
  - Within campus and offices, using multicasting file distribution can be done.
  - System messages, news and videos can be sent at the same time.
  - More commonly used for audio and video streaming. 
  - Used for programming on MBone which allows the users at high-bandwidth points to receive video and sound programming.
  - It also uses a protocol which allows the signal to be encapsulated as TCP/IP packet.
								          
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