Windows Server 2012 Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

The unique local unicast address is the IPv6 equivalent to a private IPv4 address because it is designed for local communication within a single site or between a limited set of sites, similar to how private IPv4 addresses can be used within a local network. Unique local addresses are not routable on the global Internet, providing a way for networks to communicate without conflicting with other networks.

These addresses start with the prefix FC00::/7, which means they are reserved for local use and can be freely used without the risk of overlapping with globally unique addresses. This parallels the function of private IPv4 addresses, which are used within private networks and include ranges like 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255.

Understanding this concept is crucial when designing networks, as it allows administrators to allocate addresses for devices inside a network without depleting the global IPv4 address space and ensures that addresses are not directly reachable from the Internet.