Mostly we mention cidr as classless interdomain routing, so I thought of why not there is classful interdomain routing
I want to know what problems are there in classful addressing for interdomain routing
CIDR: stands for classless inter-domain routing
Interdomain Routing: means exchanging information between different networks that are under different administrative control eg. one controlled by IIT and another controlled by (say) AIIMS
Normally this mechanism uses classless addressing of IPv4 so named cidr
Protocol is BGP-Border Gateway Protocol which is a Exterior Gateway Protocol
My doubt is whether this mechanism is possible using classful addressing of IPv4 or if not why it is not possible?