an address shared

an address that has a single sender, multiple listeners, and only one responder (normally the "nearest" one, according to the routing protocols' measure of distance)

an address that is assigned to a set of interfaces that typically belong to different nodes

An IPv6 address that is assigned to a group of interfaces (typically belonging to different nodes). A packet that is sent to an anycast address is routed to the nearest interface having that address. The packet's route is in compliance with the routing protocol's measure of distance.

An IP address that is assigned to more than one interface (typically belonging to different nodes), where a packet sent to an anycast address is routed to the nearest interface having that address, according to the routing protocol's measure of distance.