多项选择题
Which two are default preference values for both internal and external IS-IS Level 2 routes on a Juniper Networks router?（）
A. 15 B. 18 C. 150 D. 165
多项选择题 What are two purposes of the 224.0.1.40 address in Auto-RP?（）
单项选择题 Into which protocol are LDP hello messages encapsulated?（）
多项选择题 Given the community: community my-company members "^[1-3]*7:666$"; Which three communitiesdoes this expression match?（）
