单项选择题 Why is QoS important in a converged network?（）

单项选择题 A consulting firm is locating 30 consultants at a client site for a nine-month project. What need does the firm have that can be met by a wireless solution?（）

单项选择题 If an enterprise customer required A switch for their branch office access layer, which family of switches would the customer likely choose from?（）