多项选择题
What are two purposes of the AS_PATH attribute?（）
A. route selection B. loop avoidance C. determining equal cost paths for reachablilty D. defining the application of other BGP attributes
单项选择题 What is the first step in BGP route selection?（）
单项选择题 Two Level 2 routers are exchanging Hello packets with different Area IDs. What occurs between these routers?（）
单项选择题 What command would you use to view an IS-IS adjacency?（）
