IPv6 Addresses Hwajung Lee Key Reference: Deploying IPv6 in Unified Communications Networks with Cisco Unified Communications Manager, CISCO http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/ipv6/ipv6srnd/basics.html

Types of IPv6 Addresses Unicast Address Multicast Address Identifies a single node or interface. Traffic destined for a unicast address is forwarded to a single interface. Multicast Address Identified a group of nodes or interfaces. Traffic destined for a multicast address is forwarded to all the nodes in the group. Anycast Address Identified a group of nodes or interfaces. Traffic destined to an anycast address it forwarded to the nearest node in the group. An anycast is essentially a unicast address assigned to multiple devices with a host ID = 0000:0000:0000:0000. (Anycast addresses are not widely used today.) Broadcast addresses are no longer used in IPv6.

IPv6 Unicast Addresses – Network and Host IDs