Introducing Cisco Data Center Networking (DCICN) — Question 17

How many IP address ranges are specified in RFC 1918?

Answer options

• A. 1 in Class A, 2 in Class B, and 4 in Class C
• B. 2 in Class A, 4 in Class B, and 8 in Class C
• C. 4 in Class A, 8 in Class B, and 16 in Class C
• D. 1 in Class A, 16 in Class B, and 256 in Class C

Correct answer: D

Explanation

The correct answer is D because RFC 1918 defines a total of 1 range in Class A (10.0.0.0/8), 16 ranges in Class B (172.16.0.0/12), and 256 ranges in Class C (192.168.0.0/16). The other options incorrectly enumerate the number of ranges in each class according to the specifications outlined in the RFC.