Which statement about NAT is true?

• A. It eliminates the need for private addresses.
• B. NAT translates between private and public addresses to allow private networks to access the public internet.
• C. NAT increases the number of available public IP addresses.
• D. NAT changes DNS records to route traffic.

Answer: (B)

The main idea being tested is how NAT translates private addresses to public ones so a private network can reach the Internet. NAT takes the private, non-routable addresses inside your network and maps them to a publicly reachable address on the edge router. It can use a single public IP with different port numbers to keep many internal connections separate, allowing multiple devices to share that one public address while still receiving responses back correctly. This is the mechanism that makes private networks able to access the public Internet without needing a unique public IP for every device, and it explains why NAT is about address translation between private and public ranges.

This isn’t about eliminating private addresses—that remains the internal, non-routable space used inside your network. It also doesn’t create more public IPs; in fact, it conserves them by letting many devices share the same public address. And NAT doesn’t modify DNS records to route traffic; DNS resolves names to IPs, while NAT deals with translating addresses in the actual packets as they pass through the gateway.