Turbocharge Your IT Journey: Ace the Cisco Certified Network Pro Test 2025 – Network Ninja Style!

The global unicast prefix range for IPv6 starts from the prefix 2000::/3. This range is reserved specifically for globally unique addresses that can be routed over the internet. IPv6 addressing architecture uses different address types, and global unicast addresses are particularly significant because they allow for every device on the IPv6 network to have a unique address, facilitating end-to-end connectivity without the necessity for Network Address Translation (NAT).

The range 2000::/3 includes all addresses from 2000:: to 3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff. This broad range supports a large number of unique addresses, effectively addressing the exhaustion concerns that were apparent with IPv4.

The other options fall outside the established global unicast range. The prefix 1000::/4 is allocated for specific purposes and not used for global unicast addressing. Similarly, the prefixes 3000::/3 and 4000::/4 also do not fit within the globally routable unicast range. Understanding this range is crucial for network professionals to configure and manage IPv6 addressing schemes effectively.