Cisco Certified Network Associate (CCNA) Practice Exam

What is the significance of an IPv6 Global Unicast address?

1. It is used for local communication only

2. It is the IPv6 equivalent of the IPv4 public IP address

3. It is assigned for testing purposes

4. It is dynamically allocated to private networks

The correct answer is: It is the IPv6 equivalent of the IPv4 public IP address

The significance of an IPv6 Global Unicast address lies in its role as the IPv6 equivalent of the IPv4 public IP address. Global Unicast addresses are routable on the internet, allowing devices with such addresses to communicate with other devices across various networks globally. These addresses ensure that each device on the internet has a unique address to facilitate proper routing and delivery of packets. In IPv6, Global Unicast addresses typically fall within specific address ranges (such as 2000::/3) and are assigned by internet registries, similar to how IPv4 public IP addresses are allocated. This unique addressing ensures that devices can be reached from any other location on the internet, supporting connectivity for everything from web servers to IoT devices. The other options do not accurately describe Global Unicast addresses; for instance, they are not limited to local communication, nor are they solely for testing purposes, and they do not pertain to private networks, as those are designated for internal use and use different address ranges (like 10.0.0.0/8 or 192.168.0.0/16).