Exam 350-401 topic 1 question 241 discussion

Actual exam question from Cisco's 350-401

Question #: 241
Topic #: 1

A network engineer is configuring Flexible NetFlow and enters these commands. sampler NetFlow1 mode random one-out-of 100 interface fastethernet 1/0 flow-sampler NetFlow1
What are two results of implementing this feature instead of traditional NetFlow? (Choose two.)

A. Only the flows of top 100 talkers are exported.
B. CPU and memory utilization are reduced.
C. The number of packets to be analyzed are reduced.
D. The data export flow is more secure.
E. The accuracy of the data to be analyzed is improved.

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Suggested Answer: BC 🗳️

by [deleted] at May 10, 2021, 7:33 p.m.

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SandyIndia

Highly Voted 3 years, 8 months ago

Flow sampling reduces the CPU overhead of analyzing traffic with Flexible NetFlow by reducing the number of packets that are analyzed. Flow samplers are used to reduce the load on the device that is running by limiting the number of packets that are selected for analysis. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fnetflow/configuration/15-mt/fnf-15-mt-book/use-fnflow-redce-cpu.pdf

upvoted 7 times

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[Removed]

Highly Voted 4 years ago

The given answer is correct

upvoted 7 times

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AbdullahMohammad251

Most Recent 9 months, 1 week ago

Selected Answer: BC

Traffic to be analyzed is reduced by a sampling rate of 1% (out of every 100 packets, only one packet will be captured, exported, and analyzed) thus reducing CPU and memory load. The accuracy will be degraded since not all of the traffic will be analyzed. Security of the exported data can be enhanced through encryption, hashing, firewalls, etc.

upvoted 2 times

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[Removed]

1 year ago

Selected Answer: BC

it's just taking samples: rather than having 100 flows one for each interface, it's collecting a random flow "1 flow randomly chosen between 100 interfaces" which will result of lower Resources usage and fewer packets

upvoted 1 times

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