1.
2.202.203.204.0分为4个子网是:202.203.204.0/202.203.204.64/202.203.204.128/202.203.204.192
这4个子网的起始,终结IP和子网掩码分别是
202.203.204.0 ~ 202.203.204.63
202.203.204.64 ~ 202.203.204.127
202.203.204.128 ~ 202.203.204.191
202.203.204.192 ~ 202.203.204.255
子网掩码是.255.255.255.192
202.203.224.0分为8个子网的情况:
202.203.224.0 ~ 202.203.224.31
202.203.224.32 ~ 202.203.224.63
202.203.224.64 ~ 202.203.224.95
202.203.224.96 ~ 202.203.224.127
202.203.224.128 ~ 202.203.224.159
202.203.224.160 ~ 202.203.224.191
202.203.224.192 ~ 202.203.224.223
202.203.224.224 ~ 202.203.224.255
子网掩码是255.255.255.224
收获：学会查找数据报，ip地址(分类a,b,c,),初步学习了子网划分但掌握的并不到位,对于2进制的运算还很陌生,懂得用指令查看路由器
