Publisher Summary This chapter discusses the inclusion of anycast in IPv6, a type of address that is like multicast. More than one node can respond to packets sent to the anycast address. The difference is that packets sent to multicast addresses are delivered to all the nodes listening to those addresses. Nodes send packets to an anycast address when they only need one of a group of nodes to respond. It introduces the IPv6 anycast address type and examines the way anycast works and the purpose for which anycast can be used for. The chapter starts with brief introduction of the current state of the IPv6 anycast specification, followed by summary of some of the work that is currently being undertaken to make anycast work and to exploit anycast for useful applications.