Question

Percent of addresses occupied by Class D?

(a) 50 %

(b) 25 %

(c) 6.25 %

(d) 12.5 %

This question was addressed to me during an interview.

Asked question is from Classful Addressing topic in section Internet Protocol, Network Addressing and Transport Level Security of Cryptograph & Network Security

Answer 1

Correct answer is (c) 6.25 %

For explanation I would say: Class D has 2^28 addresses in total.