IP Address Format
Three all-zero network numbers are reserved
127 Class A + 16,381 Class B + 2,097,151 Class C networks = 2,113,659 networks total
20% of Class B were assigned by 7/90 and doubling every 14 months ? Will exhaust by 3/94
Question: Estimate how big will you become? Answer: More than 256! Class C is too small. Class B is just right.