A.一个A类地址
B.两个C类地址
C.一个C类地址
D.一个D类地址
A.201.109.39.68
B.120.34.0.18
C.21.18.33.48
D.127.0.257.1
A.201.109.39.68
B.21.18.33.48
C.120.34.0.18
D.127.0.0.1
A.201.109.39.68
B.127.0.0.1
C.21.18.33.48
D.61.139.2.69
E.无
A.201.109. 39. 68
B.120. 34. 0.18
C.21.18. 33. 48
D.127.0.257.1