Which statement about IPv6 benefits is incorrect?

• A. More private address collisions
• B. Auto-configuration
• C. Flexible options and extensions
• D. No more NAT

Answer: (A)

IPv6 improves how addresses are managed and assigned, which makes address collisions practically unlikely. With an enormous address space (2^128) and automatic address configuration, each device can obtain a unique address on its network without manual intervention, and privacy features add even more randomness to address selection rather than repeating or reusing addresses. That’s why the idea of “more private address collisions” doesn’t fit IPv6’s behavior.

The other statements reflect real benefits. Auto-configuration means devices can configure themselves (via SLAAC or DHCPv6) without manual setup. Flexible options and extensions come from extension headers that let networks carry additional control information as needed. And no more NAT points to IPv6’s end-to-end connectivity design, where devices can communicate directly with globally unique addresses, reducing the need for network address translation.