IPv6 Solicited Node Multicast Address

Hi Rene,

Thank you for the clarity of your work. Although I understand how the NSM works, I have some gray areas:
1 - When you activate ipv6 on an interface, the latter joins a multicast group. This multicast group is used by NDP to retrieve the MAC address of the neighbor or detect duplicate addresses. But in packet exchanges, I see that it is unicast and not multicast. When we talk about multicast, we are talking about broadcasting from a source to a group of recipients, which is quite confusing. Can you please bring me some clarification?
2 - How does a switch manage flows when trying to join a host’s multicast group on the network?