单项选择题
A. router ospf ipv6 process - id
B. ipv6 ospf process - id
C. router ospf process - id
D. ipv6 router ospf process - id
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?（）
单项选择题 What is IPv6 router solicitation?（）
多项选择题 To enable BGP tunneling over an IPv4 backbone, the IPv4 address 192.168.30.1 is converted into a valid IPv6 address. Which three IPv6 addresses are acceptable formats for the IPv4 address? （）