Designing for Cisco Internetwork Solutions (DESGN, legacy) — Question 31

What two addresses are defined under RFC 1918? (Choose two.)

Answer options

• A. 19.22.37.1
• B. 10.1.7.19
• C. 127.0.0.1
• D. 172.31.1.1
• E. 239.15.12.1

Correct answer: B, D

Explanation

RFC 1918 defines private IP address ranges for use within private networks, which include 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255. Therefore, addresses B (10.1.7.19) and D (172.31.1.1) are valid private addresses as per RFC 1918, while A, C, and E do not fall within those ranges.