The process of an ISATAP host communicating with an IPv6 node on an IPv6-capable subnet involves two different connections: a connection between the ISATAP router and the IPv6-capable subnet and which of the following?

A. a router-to-host connection through an ISATAP proxy
B. an ISATAP gateway connection through the ISATAP tunnel
C. a host-to-host tunnel from the ISATAP router to the non-ISATAP router
D. a host-to-router tunnel from the ISATAP node to the ISATAP router

Answer: D