Is an open standard promotes interoperability among the wireless client adapters and dial-inservers from different vendors.（）

A. Reduced travel time for instructors responsible for different geographic sites
B. Real-time discussions of patient information among remote medical teams
C. Improved morale and reduced turnover among employees who receive timely business Updates
D. Increased sales and customer satisfaction due to current product information disseminated simultaneously to a global sales force by headquarters

A. It reads the Layer-5 information and sends the message directly to the intended computer.
B. It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.
C. It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
D. It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.