多项选择题 Your company plans on migrating their network from IPv4 to IPv6 in the near future. Which three techniques can be used to transition from IPv4 to IPv6？（）

单项选择题 Which command enables OSPF for IPv6?（）

单项选择题 Your network trainee asks you, in the context of IPv6 and OSPF, what best des cribes a type 9 LSA? What should you tell her?（）