Changes

32-bit length IP addresses were chosen and this is what we call '''IPv4''' today. A 32-bit length means that there can be 2³² or 4,294,967,296 distinct IP addresses which is nearly not enough to meet the demand of today's internet savvy society - with over 7 billion people in the world and countless more devices there is just no way that only 4.2 billion unique address would suffice. NAT solves this problem by remapping one IP address space into another by modifying network address information in IP header of packets. This way several devices can use one '''Public IP address''' to send and receive packets through the Internet.

32-bit length IP addresses were chosen and this is what we call '''IPv4''' today. A 32-bit length means that there can be 2³² or 4,294,967,296 distinct IP addresses which is nearly not enough to meet the demand of today's internet savvy society - with over 7 billion people in the world and countless more devices there is just no way that only 4.2 billion unique address would suffice. NAT solves this problem by remapping one IP address space into another by modifying network address information in IP header of packets. This way several devices can use one '''Public IP address''' to send and receive packets through the Internet.