200-301 Question #1281: Real Exam Question with Answer & Explanation

Question

What is a characteristic of private IPv4 addressing?

Options

• Ais used when traffic on the subnet must traverse a site-to-site VPN to an outside organization
• Ballows endpoints to communicate across public network boundaries
• Cis used on hosts that communicate only with other internal hosts
• Dreduces network complexity

Explanation

Private IPv4 addresses are designated for use solely within private networks and are not routable on the public internet.

Common mistakes.

• A. While private IP addresses are often used for hosts that access outside organizations via VPNs, the VPN itself handles the secure tunnel, and Network Address Translation (NAT) typically translates the private IP for external routing, so this isn't a characteristic of the private IP itself.
• B. Private IP addresses inherently do not allow endpoints to communicate across public network boundaries; NAT is required to translate them to public IPs for such communication.
• D. Using private IP addresses, especially with NAT, often adds complexity to network design and troubleshooting rather than reducing it.

Concept tested. Private IPv4 addressing characteristics

Reference. https://datatracker.ietf.org/doc/html/rfc1918

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