Refer to the exhibit. What is the effect of introducing the sampler feature into the Flexible NetFlow configuration on the router?

Question

Exhibits

Options

• ANetFlow updates to the collector are sent 50% less frequently.
• BEvery second IPv4 packet is forwarded to the collector for inspection.
• CCPU and memory utilization are reduced when compared with what is required for full NetFlow.
• DThe resolution of sampling data increases, but it requires more performance from the router.

• A
  4% (1)
• C
  93% (25)
• D
  4% (1)

Explanation

Flexible NetFlow Sampler Explanation

Introducing a sampler into a Flexible NetFlow configuration instructs the router to analyze only a subset of packets (e.g., 1 out of every N packets) rather than every single packet traversing the interface. This significantly reduces the CPU processing and memory overhead required, making option C correct - sampled NetFlow is a deliberate trade-off of data granularity for improved router performance.

Why the distractors are wrong:

• Option A is incorrect because the sampler affects which packets are analyzed, not the frequency of update intervals sent to the collector - those are controlled by separate export/cache timeout parameters.
• Option B is incorrect because while a 1-in-2 sample could theoretically mean every second packet, the sampler doesn't "forward packets to the collector for inspection" - it determines which packets the router itself processes for flow records; the collector receives summarized flow data, not raw packets.
• Option D is incorrect because sampling decreases resolution/granularity of data and simultaneously reduces (not increases) router performance demands - it's the opposite of what's described.

Memory Tip: Think of the sampler as a statistical shortcut - like a pollster surveying 1 in 100 voters instead of everyone. Less work = less resources, but you get an approximation, not the full picture.

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