What’s Wrong with the Address?
IP address is 32 bits in length.
- Allows for 4,294,967,296 unique addresses
A problem occurs because the addresses are grouped in a class address.
- A range of bits is applied to an address, most of which are wasted
Addresses were arbitrarily handed out without regard to geographic location.
Class C addresses were overtaxing the Internet routing tables.
Class A stopped being handed out and Class B was exhausted.
RFC 1338 introduced supernetting as a three-year fix.
It turned into Classless Inter-Domain Routing (CIDR).