多项选择题
What are three primary activities in the cycle of building an enterprise security strategy？（）
A. activity audit B. administration C. policy establishment D. technology implementation
多项选择题 Whichtwoofthesearerecommendedpracticeswithtrunks？（）
单项选择题 Whenisthesite-to-siteremoteaccessmodelappropriate？（）
单项选择题 Whichroutingprotocolsupportsaflexibleareastructureusingroutinglevelsoneandtwo？（）
