A.Itisusefulfordiagnosingdatadependentproblemsbyfillingthepacketwiththebytepatternfollowingthefinthecommandline.
B.Itisusefulforfloodingfromslowcharacterbasedterminalssinceitonlydisplaysadot.foreachpacketsentinfastmode.
C.Itisusefulforfloodingfromslowcharacterbasedterminalssinceitonlydisplaysadot.foreachpacketsentandabackspaceonreturnedinfastmode.
D.Thecommandcanonlyberunbyroot.
参考答案：D
