Private IPv4 Addressing for New Subnet: When is it Appropriate?

Appropriate Use of Private IPv4 Addressing


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



Click on the arrows to vote for the correct answer

A. B. C. D.


Private IPv4 addresses are used within an organization's network to enable communication between devices without the need for public IP addresses. The use of private IP addresses is appropriate in situations where traffic on a subnet will stay within the organization and not require communication with external networks.

Option A, "The network has multiple endpoint listeners, and it is desired to limit the number of broadcasts," is not a valid reason to use private IP addresses. Broadcast traffic is typically limited through the use of VLANs or other network segmentation techniques.

Option B, "The ISP requires the new subnet to be advertised to the Internet for web services," would require the use of public IP addresses, as private IP addresses are not routable over the Internet.

Option D, "Traffic on the subnet must traverse a site-to-site VPN to an outside organization," does not necessarily require the use of private IP addresses. The VPN tunnel can be configured to translate the private IP addresses to public IP addresses as necessary for communication with the external organization.

Option C, "There is limited unique address space, and traffic on the new subnet will stay local within the organization," is the correct answer. Private IP addresses are typically used in situations where there is a limited amount of unique address space available, such as within an organization's private network. As long as the traffic on the new subnet does not need to communicate with external networks, private IP addresses are appropriate for the new subnet.