IP multicasting is a set of technologies that enable efficient delivery of data to many locations on a network. Rather than making multiple copies of a message intended to be distributed to multiple recipients at the __(71)__ of origin of a message, multicasting initially sends just one __(72)__ and does not copy it to the individual recipients until it reaches the closest common point on the network, thereby __(73)__ the bandwidth consumed. Network performance is significantly (74) because it isn’t bogged down with the processing and transmission of several large data files; each receiving computer doesn’t have to __(75)__ the transmitting server for the file.(71)