AnattackersendsalowrateofTCPSYNsegmentstohosts hopingthatatleastoneportreplies.Which typeofanattackdoesthisscenariodescribe?()

AnattackersendsalowrateofTCPSYNsegmentstohosts，hopingthatatleastoneportreplies.Which typeofanattackdoesthisscenariodescribe？（）

A、DoS

B、SYNflood

C、portscanning

D、IPaddresssweep