It has been proved that network coding can be used to improve the throughput for multicast t ransmission , but such systems are very vulnerable to contamination at tack , and the signatures for t raditional network are no longer suitable for net

c++的程序，举得很有用，我也不知道说什么好了，非要-qw fg fg 7 fgk dy opln ry l et er er fd d4 4b 6b rt 54 t