Final answer:
The term 'level 1 ultimate routes' is not applicable to IPv6 routing. IPv6 has its own set of routing mechanisms that differ from IPv4's structure, including its approach to routing and address allocation. Thus, IPv6 does not use the concept of level 1 ultimate routes.
Step-by-step explanation:
The concept of 'level 1 ultimate routes' is not a term commonly used in the context of IPv6 routing. IPv6 has its specific routing mechanisms and terminologies that facilitate internet traffic routing. It is structured differently from IPv4 in various aspects including addressing, routing prefix allocation, and route aggregation.
In IPv4, routing tables can have various types of routes like ultimate routes, level 1 routes, and others depending on the routing protocol. An 'ultimate route' is a term used in the context of Cisco routers to describe a route that has a next-hop IP address or an exit interface directly associated with it, implying that it's a final route to a destination without requiring a pointer to another route.
Since IPv6 uses different mechanisms, the concept of 'level 1 ultimate routes' would not directly apply to IPv6 routing tables. Therefore, the accurate answer is that IPv6 uses a different hierarchy, so the concept of level 1 ultimate routes does not apply.