A.202.196.176.223
B.202.196.176.0
C.202.196.176.194
D.202.196.176.192
A.255.255.255.0
B.255.255.255.128
C.255.255.255.240
D.255.255.255.227
A.255.255.255.252
B.255.255.255.248
C.255.255.255.240
D.255.255.255.255
A.255.255.255.252
B.255.255.255.248
C.255.255.255.240
D.255.255.255.224
A.255.255.255.0
B.255.255.255.128
C.255.255.255.192
D.255.255.255.224
某单位分配到一个IP地址,其网络地址为129.250.0.0,请问:
(1)该单位的IP地址属于A-E中的哪一类?为什么?
(2)该单位如果选用子网掩码为255.255.240.0,试问该单位最多分出多少个子网?子网上的主机数最多是多少?
(3)该单位如果选用子网掩码为255.255.240.0,请判断IP地址分别为129.250.203.25和 129. 250. 201.133的两台主机是否在同一子网中?请说明理由或描述计算过程。