February-March
2002
Classless inter domain routing (CIDR)
nRouting table size (router memory) is a limited resource
nGoal of CIDR: aggregate many small address block into one larger block
internet
ISP
customer
customer
customer
customer
192.168.3/24
192.168.2/24
192.168.1/24
192.168.0/24
192.168.0/22
Aggregated route