19.已知某一台電腦的P位址為201.180.56.5,其預設遮罩為255.255.255.0及C級預設遮罩,則該網路的網路位址(Network Address)為何?
(A)201.180.56.0
(B)201.180.56.1
(C)201.180.56.5
(D)201.180.56.128

答案：登入後查看
統計： A(174), B(16), C(17), D(15), E(0) #2404935