Subnetting, CIDR, Subnet VPC, AWS

 172.31.16.0/20
172.31.0.0/20
172.31.32.0/20

https://www.davidc.net/sites/default/subnets/subnets.html [Subnetting] [It Divides Ranges]

5 Hosts are reserved by AWS

1)0 : Network Name

2) 1: Router

3) 2: DNS Name Server

4) Unknown

5)Broadcasting Netcasting

172.31.0.0/20
172.31.16.0/20
172.31.32.0/20
172.31.48.0/20
172.31.64.0/20
172.31.80.0/20
   
10.0.0.0/8=10.0.0.0 – 10.255.255.255
192.168.0.0/16=192.168.0.0 – 192.168.255.255
172.16.0.0/12=172.16.0.0 – 172.31.255.255

http://help.collab.net/index.jsp?topic=/teamforge171/faq/privateIP.html

An address is Private if it starts with:

• 10 or
• 192.168 or
• 172.[16-31]