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 fries; each receiving computer doesn’t have to (75) the transmitting server for the file.

A. entity B. procession C. volumeD. message

国家垄断资本主义（）

A、可以调节社会生产；但没有消灭资本主义的矛盾

B、能够解决资本主义的基本矛盾；改变资本主义性质

C、通过调节社会生产，克服了生产的盲目性

D、通过各种福利政策使劳动者摆脱被剥削的地位