What are three reasons to collect NetFlow data on a company network? (Choose three)
Correct Answer: A,D,F
Explanation/Reference:
Explanation
NetFlow facilitates solutions to many common problems encountered by IT professionals.
Analyze new applications and their network impact
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Identify new application network loads such as VoIP or remote site additions.
Reduction in peak WAN traffic
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Use NetFlow statistics to measure WAN traffic improvement from application-policy changes; understand who is utilizing the network and the network top talkers.
Troubleshooting and understanding network pain points
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Diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools. -> D is correct.
Detection of unauthorized WAN traffic
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Avoid costly upgrades by identifying the applications causing congestion. -> A is correct.
Security and anomaly detection
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NetFlow can be used for anomaly detection and worm diagnosis along with applications such as Cisco CS- Mars.
Validation of QoS parameters
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Confirm that appropriate bandwidth has been allocated to each Class of Service (CoS) and that no CoS is over- or under-subscribed.-> F is correct.
(Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-netflow/ prod_white_paper0900aecd80406232.html)