What are three reasons to collect Netflow data on a company network?（）

• A、To identify applications causing congestion
• B、To authorize user network access
• C、To report and alert link up / down instances.
• D、To diagnose slow network performance, bandwidth hogs, and bandwidth utilization.
• E、To detect suboptimal routing in the network.
• F、To confirm the appropriate amount of bandwidth that has been allocated to each Class of Service.