单项选择题
A.Because voice data packets must follow a single dedicated path through the network
B.Because voice data packets should arrive quickly and sequentially, and with no lost data
C.Because lost voice-data packets must be retransmitted
D.Because data does not need to arrive intact, so data transfer rates can be variable
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?（）
多项选择题 Which two features characterize controller-based deployments in a WLAN?（）