单项选择题 You work as network consultant. Your customer, TestKing Inc, has a class C network license. TestKing wants you to subnet the network to provide a separate subnet for each of its 5 departments. Each subnet must support at least 24 hosts. Which network mask should you use?（）

单项选择题 企业的三流是指（）

多项选择题 You need to ensure that there is adequate bandwidth available to meet the service-level agreement requirements.  Which action or actions should you perform？ （）