单项选择题
Which IPv6 address correctly compresses the IPv6 unicast address 2001:0:0:0:0DB8:0:0:417A?（）
A. 2001:0DB8:417A B. 2001::0DB8::417A C. 2001:::0DB8::417A D. 2001:0D B8:0:0:417A E. 2001::DB8:0:0:417A F. 2001:::0DB8:0:0:417A
多项选择题 Which three are characteristics of IPv6?（）
单项选择题 How is authentication handled with OSPFv3?（）
单项选择题 What is the difference between the IPv6 addresses ::/0 and :: /128? （）
