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A campus network needs end-to-end QoS tools to manage traffic and ensure voice quality. Which three types of QoS tools are needed? (Choose three.)
Correct Answer: A,D,E
Explanation/Reference: Explanation: Campus LAN QoS Considerations For the access layer of the campus LAN, you can classify and mark frames or packets to apply quality of service (QoS) policies in the distribution or at the enterprise edge. Classification is a fundamental building block of QoS and involves recognizing and distinguishing between different traffic streams. For example, you distinguish between HTTP/HTTPS, FTP, and VoIP traffic. Without classification, all traffic is treated the same.