20.下列何者是標記/26的子網路遮罩?
(A)255.255.192.0
(B)255.255.240.0
(C)255.255.255.192
(D)255.255.255.240

答案:登入後查看
統計: A(0), B(2), C(47), D(0), E(0) #2517408