单项选择题
Which IPV6 routing protocol uses multicast group FF02::8 to send updates?（）
A.RIPng B.OSPFv3 C.IS-IS for IPv6 D.static
多项选择题 What information does a router running a link-state protocol use to build and maintain its topological database?（）
多项选择题 OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? （）
多项选择题 Which are valid modes for a switch port used as a VLAN trunk? （）
