This is solved through the process of elimination and a bit of lateral thinking.
Let's look at the first two categories first (the easier ones)...
Multicast:
1. Derived from the FFOO::/8 address range. Can't argue with that.
2. Provides one-to-many communications. That's what multicast is , one-to-many.
Unicast:
1. Includes Link-Local and Loopback addresses. Yip, these are single destinations.
2. Identifies an interface on an IPv6 device. Again, yip - it's a single destination.
AnyCast:
1. Used exclusively by a non-host device. I think what they are alluding to here is that this address is associated with a group of servers that share an IP address, not a single host (non-host).
2. Assigned to more than one interface. Yes - by definition its one-to-closest, so that implies there's more than one instance of it, so it must be assigned to more than one interface.
Done - Danny7 (the suggested answer) is correct.
Here is how I would categorize the descriptions into the 3 categories with only 2 descriptions per category:
Anycast
Assigned to more than one interface
Provides one to many communication
Multicast
Derived from the ff00::/8 address range
Used exclusively by a non-host device
Unicast
Identifies an interface on an IPv6 device
Includes link-local and loopback addresses
Anycast addresses can be used only by a device, not a host, and anycast addresses must not be used as the source address of an IPv6 packet.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/xe-3se/5700/ip6-anycast-add-xe.html#:~:text=Anycast%20addresses%20can%20be%20used,address%20of%20an%20IPv6%20packet.
Why any-cast is used exclusively by non-host devices? It seems to me the opposit is correct.
Also one-to-many communication is a description of anycast, not multicast.
Actually a link-local address is a type of unicast address
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