Question 590 of 1,420
mediumMultiple SelectObjective-mapped
350-401 Practice Question: Which two statements about NetFlow are true?…
Which two statements about NetFlow are true? (Choose two.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
NetFlow records are unidirectional by default.
NetFlow is a Cisco technology that collects IP traffic statistics. Traditional NetFlow (v5/v9) is unidirectional and sampled flow is used to reduce CPU load. Flexible NetFlow allows user-defined keys but still exports in NetFlow v9 or IPFIX format. NetFlow does not replace SNMP; they serve different purposes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
NetFlow records are unidirectional by default.
Why this is correct
Correct because NetFlow aggregates packets based on flow keys (e.g., source/destination IP, ports) and records traffic in one direction only.
- ✓
Sampled NetFlow reduces CPU impact by analyzing only a subset of packets.
Why this is correct
Correct because sampled NetFlow (e.g., random sampled) processes only every Nth packet, lowering CPU usage on the router.
- ✗
Flexible NetFlow can export user-defined flow keys using NetFlow v5 format.
Why it's wrong here
Incorrect because Flexible NetFlow uses NetFlow v9 or IPFIX export formats, not the fixed v5 format.
- ✗
NetFlow can be used as a replacement for SNMP polling for interface utilization.
Why it's wrong here
Incorrect because NetFlow provides per-flow traffic details, not aggregate interface counters; SNMP is still needed for interface utilization monitoring.
- ✗
NetFlow v9 supports only IPv4 traffic.
Why it's wrong here
Incorrect because NetFlow v9 supports both IPv4 and IPv6, as well as MPLS and other protocols.
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Same concept, more angles
1 more way this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which two statements about NetFlow are true? (Choose two.)
medium- A.NetFlow uses TCP port 2055 for exporting flow records.
- ✓ B.NetFlow v9 is template-based, allowing flexible and extensible flow record formats. [CORRECT]
- ✓ C.Sampled NetFlow reduces CPU impact by analyzing only a subset of packets. [CORRECT]
- D.NetFlow records include the full payload of each packet.
- ✓ E.NetFlow can be used for both IPv4 and IPv6 traffic monitoring. [wrong]
Why B: Three statements are true: B (NetFlow v9 is template-based), C (Sampled NetFlow reduces CPU impact), and E (NetFlow can be used for IPv4 and IPv6 monitoring). The question asks for two, but three are factually correct; the original marking of E as wrong is inaccurate. A uses TCP instead of UDP, and D incorrectly claims full payload inclusion.
Last reviewed: Jun 18, 2026
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.
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