how to differentiate between a public and private subnet using IP addresses
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To differentiate between a public and private subnet using IP addresses, you can utilize the range of IP addresses reserved for private networks defined in RFC 1918. Here's how you can do it:
Check IP Address Range:
If the IP address falls within the ranges defined in RFC 1918, it's a private IP address, indicating that the subnet is likely a private subnet.
If the IP address does not fall within these ranges, it's likely a public IP address, indicating that the subnet is a public subnet.
RFC 1918 Private IP Address Ranges:
10.0.0.0 - 10.255.255.255 (10.0.0.0/8)
172.16.0.0 - 172.31.255.255 (172.16.0.0/12)
192.168.0.0 - 192.168.255.255 (192.168.0.0/16)
Example:
If you have an IP address like 192.168.1.100, it falls within the private IP address range, indicating that the subnet is likely private.
If you have an IP address like 203.0.113.10, it does not fall within the private IP address ranges, indicating that the subnet is likely public.
By checking whether an IP address falls within the private IP address ranges, you can determine whether it belongs to a private subnet or a public subnet.
