A packet sent to a multicast address reaches what destinations?

This describes anycast, where the packet is routed to the 'nearest' server or interface in a group, not multicast.

Multicast communication is a method where a single packet is transmitted from a source to multiple selected destinations simultaneously. When a packet is sent to a multicast address, it reaches all hosts that have explicitly joined that particular multicast group, and no other hosts.

This describes broadcast, where the packet is sent to all hosts on a particular network segment or network.

While multicast addresses have reserved ranges, 'Reserved global destinations' does not accurately describe the delivery mechanism of a multicast packet.