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IP mpticasting is a set of technologies that enable efficient depvery of data to many locations on a network. Rather than making mptiple copies of a message intended to be distributed to mptiple recipients at the （） of origin of a message, mpticasting initially sends just one （） and does not copy it to the individual recipients until it reaches the closest common point on the network, thereby （） the bandwidth consumed. Network performance is significantly （） because it isn’t bogged down with the processing and transmission of several large data files; each receiving computer doesn’t have to （） the transmitting server for the file.

A.loop

B.find

C.search

D.query

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