Cisco Certified Network Professional 2026 – 400 Free Practice Questions to Pass the Exam

The range of a Link-Local IPv6 address is defined by the prefix FE80::/10. This range is specifically allocated for communication within the local network segment and is not routable on the internet. Link-Local addresses are automatically configured on all IPv6-enabled interfaces and allow devices to communicate with each other when no external configuration (such as DHCPv6 or manual addressing) is available.

Link-Local addresses play a crucial role in various protocols, such as Neighbor Discovery Protocol (NDP), which facilitates the discovery of other devices on the same network as well as the determination of link-layer addresses. The addresses in the FE80::/10 range start with the binary value 1111 1110, which is what makes them identifiable as Link-Local addresses.

In contrast, the other options represent different address ranges. FD00::/8 indicates a Unique Local Address range, which is meant for local communication but can be routed within private networks, and FC00::/7 is intended for Unique Local Addresses as well. 2001::/16 corresponds to a Global Unicast Address, which is routable on the internet. Understanding these distinctions is essential for effective IPv6 network design and operation.