多项选择题
Small businesses face unique customer challenges, which three challenges are small businesses looking to overcome? （）
A.technical staffing B.data center deployments C.employee training D.cost containment E.operational efficiency F.customer responsiveness
单项选择题 What feature does the Partner E-Learning Connection provide?（）
单项选择题 Which network technology addresses these customer business needs: shrinking budgets and IT staffs, more complex networks, and an increased need for network security?（）
单项选择题 What is A WAN?（）
