IPv6 uses NS and NA packets to perform duplicate address detection (DAD).

The statement is correct. Duplicate Address Detection (DAD) is a mandatory process in IPv6 Stateless Address Autoconfiguration (SLAAC). Before a node can use a newly configured IPv6 address, it must verify that the address is unique on the local link. To do this, the node sends a Neighbor Solicitation (NS) message with the tentative address as the target address. If another node on the link is already using this address, it will respond with a Neighbor Advertisement (NA) message, indicating a duplicate. If no NA is received, the address is considered unique.

This is a true/false style question. The statement presented is factually correct according to IPv6 standards, so it is considered 'True' (represented by option A). There are no other options to evaluate as incorrect.

- RFC 4862, "IPv6 Stateless Address Autoconfiguration", Section 5.4, "Duplicate Address Detection". This RFC specifies the DAD mechanism, detailing the use of Neighbor Solicitation and Neighbor Advertisement messages.

- Huawei HedEx Documentation, S12700 V200R019C10 Configuration Guide - IP Unicast, Section: "IPv6 Autoconfiguration". The guide explains that DAD is performed using NS and NA messages to ensure address uniqueness on a link.