CCNA: Cisco Certified Network Associate — Question 325

In which situation is private IPv4 addressing appropriate for a new subnet on the network of an organization?

Answer options

• A. The network has multiple endpoint listeners, and it is desired to limit the number of broadcasts.
• B. The ISP requires the new subnet to be advertised to the Internet for web services.
• C. There is limited unique address space, and traffic on the new subnet will stay local within the organization.
• D. Traffic on the subnet must traverse a site-to-site VPN to an outside organization.

Correct answer: C

Explanation

Private IPv4 addressing is ideal in situations where the traffic will remain local, as in option C, because it helps conserve public IP addresses. Options A and D do not justify the use of private addressing since they involve external interactions or broadcast limitations. Option B is incorrect because private addresses cannot be routed on the Internet.