Internet of Things (IoT) Practice Exam

Which of the following is a benefit of IPv6 that is considered incorrect?

1. More private address collisions

2. Auto-configuration

3. Flexible options and extensions

4. No more NAT (Network Address Translation)

The correct answer is: More private address collisions

The statement about "more private address collisions" as a benefit of IPv6 is indeed incorrect. One of the primary advantages of IPv6 is its vast address space, which significantly reduces the likelihood of address collisions. With IPv4, the limited number of addresses often resulted in overlapping private address spaces and necessitated the use of techniques like Network Address Translation (NAT) to handle the scarcity of available IP addresses. In contrast, IPv6 offers a substantially larger range of addresses, allowing for unique identifiers for devices without the need for NAT, therefore enhancing direct device-to-device communication. This unique addressing capability fundamentally mitigates the risks associated with address collisions, particularly in private networks, and supports better scalability for the growing number of IoT devices. The other options, including auto-configuration, flexible options and extensions, and no more NAT, all highlight valid benefits of IPv6. Auto-configuration enables devices to automatically configure their network settings, simplifying connection processes. Flexible options and extensions improve capabilities by allowing for additional features to be added without fundamental changes to the protocol. Additionally, eliminating the need for NAT with IPv6 allows for easier routing and straightforward communication between devices, a distinct advancement compared to IPv4.