单项选择题
Which protocol can cause overload on a CPU of a managed device?（）
A. Netflow B. WCCP C. IP SLA D. SNMP
单项选择题 When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?（）
单项选择题 What is a global command?（）
单项选择题 In a switched environment, what does the IEEE 802.1Q standard describe?（）
