You need to design an IPv$6$ addressing scheme for your network. The following are key requirements for your design:

Infrastructure hosts, such as routers and servers, are assigned static interface IDs. However, workstations, notebooks, tablets, and phones are assigned interface IDs dynamically.

Internet access must be available to all hosts through an ISP.

Site$-$to$-$site WAN connections are created using leased lines.

Which type of IPv$6$ addressing is most appropriate for hosts on this network?