多项选择题
You have been asked to develop an application that uses only connection-oriented protocols. Which two protocols can you use?（）
A. PPP B. UDP C. TCP D. ICMP
单项选择题 Referring to the exhibit, which type of classifier is being used in the CoS configuration?（）
单项选择题 By default if equal-cost paths exists for the same destination, which action will the router take?（）
多项选择题 What are three examples of dynamic IGPs?（）
