Question

What is the prefix length for group 1?

(a) 8

(b) 16

(c) 24

(d) None of the mentioned

The question was posed to me in an internship interview.

My question comes from Designing Subnets in section Internet Protocol, Network Addressing and Transport Level Security of Cryptograph & Network Security

Answer 1

Correct option is (a) 8

Best explanation: 64 customers, each needs 256 addresses

Suffix length = 8 (2^8=256)

32-8 = 24.