Base conversion of subnet mask

1, 202.100.56.100/26 Which network segment does this ip address belong to?

It belongs to the 202.100.56.65-202.100.56.126 network segment.

2, 100.100.20.80 / 10 Which network segment does this ip address belong to?

 属于100.100.65.0——100.100.126.0网段。

3, 130.100.100.0/19 for subnetting,

Y=8   256-224=32
可用主机位（2的13次方减2）个  可用网络8个
130.100.0.0   130.100.32.0  130.100.64.0  130.100.96.0 130.100.128.0  130.100.160.0  130.100.192.0  130.100.224.0

4, 130.100.100.0/18 for subnetting,

Available host bits (2 to the 14th power minus 2) 4 available networks
130.100.0.0 130.100.64.0 130.100.128.0 130.100.192.0

5, 130.100.100.0 Want to generate 10 subnets and masks? ?

 8<10<16     16是2的4次方，因为130.100.100.0是B类地址，所以130.100.100.0/20   子网掩码为255.255.240.0

6, 222.98.78.0 /29 for subnetting

   8<10<16     16是2的4次方，因为130.100.100.0是B类地址，所以130.100.100.0/20   子网掩码为255.255.240.0

7,189.100.32.0 /17 for subnetting

2个     

189.100.0.0 189.100.128.0

8. 180.100.32.0 /19 For subnetting, which subnets can be generated, what is the first and last IP address of each subnet, and what is the broadcast address?

 8个可用网络        

180.100.0.0——180.100.32.0——180.100.64.0——180.100.96.0——180.100.128.0——180.100.160.0——180.100.192.0——180.100.224.0
180.100.1.0，180.100.30.0，180.100.31.0：
180.100.33.0，180.100.62.0，180.100.63.0：
180.100.65.0，180.100.94.0，180.100.95.0：
180.100.97.0，180.100.126.0，180.100.127.0：
180.100.129.0，180.100.158.0，180.100.159.0：
180.100.161.0，180.100.190.0，180.100.191.0：
180.100.193.0，180.100.222.0，180.100.223.0

9. 56.20.34.0/10 is divided into subnets, which subnets can be generated, what is the first and last IP address of each subnet, and what is the broadcast address?

 4个        

56.0.0.0——56.64.0.0——56.128.0.0——56.192.0.0
56.1.0.0，56.62.0.0，56.63.0.0：
56.65.0.0，56.126.0.0，56.127.0.0
56.129.0.0，56.190.0.0，56.191.0.0

10. 37.56.23.0/12 performs subnet division, which subnets can be generated, what is the first and last IP address of each subnet, and what is the broadcast address?

 16个    

37.0.0.0 between
37.16.0.0 and
37.240.0.0
37.1.0.0,
37.14.0.0, 37.15.0.0: 37.17.0.0, 37.30.0.0, 37.31.0.0 37.33.0.0, 37.46.0.0, 37.47.0.0 37.49.0.0, 37.62.0.0,
37.63.0.0
37.65.0.0,
37.78.0.0,
37.79.0.0 37.81.0.0, 37.94.0.0, 37.95.0.0 37.97.0.0, 37.110.0.0, 37.111.0.0 37.113.0.0, 37.126.0.0, 37.127. 0.0
37.129.0.0,
37.142.0.0,
37.143.0.0
37.145.0.0,
37.158.0.0 , 37.159.0.0 37.161.0.0, 37.174.0.0, 37.175.0.0 37.177.0.0, 37.190.0.0, 37.191.0.0 37.193.0.0, 37.206 .0.0,
37.207.0.0
37.209.0.0,
37.222.0.0, 37.223.0.0 37.225.0.0, 37.238.0.0, 37.239.0.0 37.241.0.0, 37.254.0.0, 37.255.0.0