Question

What are the advantages of classless addressing over classful addressing?

Answer 1

CIDR provides numerous advantages over the “classful” addressing scheme, whether or not subnetting is used:Efficient Address Space Allocation: Instead of allocating addresses in fixed-size blocks of low granularity, under CIDR addresses are allocated in sizes of any binary multiple.

Answer 2

Advantages of classless addressing over classful addressing:

• Classful addressing does not send subnet information.
• Efficient address-space allocation is available in classless addressing
• Memory is allocated in terms of bits and bytes rather than huge chunks of contiguous memory.
• It eliminates any class imbalances
• Routing entries are much more efficient
• There are no separate entities for subnetting.