多项选择题
You are at the top of the hierarchy and must configure OSPF on interface so-0/0/0 unit 100. Which two achieve this result?（）
A. set protocols set ospf area 0 set interface so-0/0/0.100 B. set protocols ospf area 0 interface so-0/0/0.100 C. edit protocols ospf interface so-0/0/0.100 D. edit protocols ospf area 0 set interface so-0/0/0.100
单项选择题 What is the default protocol preference for OSPF internal routes?（）
单项选择题 Given the routing entries shown in the exhibit, which next-hop IP address will be used for die destination IP address 192.168.1.142? （）
多项选择题 Which three protocols use UDP as a transport protocol by default?（）
