题目内容：
A. This is the designated router (DR) on the FastEthernet 0/0 link.
B. The output was generated by the show ip interface c ommand.
C. The router was configured with the commands:r outer ospf 1 network 172.16.6.0 0.0.0.255 area 1
D. The IP address of the backup designated router (BDR) is FE80::205:5FFF:FED3:5808.
E. Interface FastEthernet 0/0 was configured with the ipv6 o spf 1 area 1 command.
F. OSPF version 2 has been enabled to support IPv6.
参考答案：