Final answer:
The answer is false. IPv6 devices are not required to join a solicited node multicast group address.
Step-by-step explanation:
The answer to the question is false.
An IPv6 device is not required to join a solicited node multicast group address. Rather, it listens to the solicited node multicast group address to receive Neighbor Discovery Protocol (NDP) messages related to IPv6 address resolution and Neighbor Unreachability Detection (NUD). Joining the solicited node multicast group address is an optional step.
For example, an IPv6 device may send a Neighbor Solicitation (NS) message to inquire about the link-layer address of another specific IPv6 device, without needing to join the solicited node multicast group address.