16. IPv6 Neighbor Solicitation and Advertisement
Neighbor Solicitation (NS) and Neighbor Advertisement (NA) are key messages in the IPv6 Neighbor Discovery Protocol (NDP), playing critical roles in IPv6 communication. These messages handle tasks like address resolution (replacing ARP) to determine link-layer addresses from IPv6 addresses, checking for duplicate addresses (Duplicate Address Detection), and performing neighbor unreachability detection. In this section, we will demonstrate how these functions work in practice.
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