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300-410 Practice Question: Which TWO statements about NetFlow version 9 and…
Which TWO statements about NetFlow version 9 and Flexible 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
✓
Flexible NetFlow is built upon the NetFlow version 9 template architecture.
NetFlow version 9 uses a template-based design, allowing flexible field definitions, which is the foundation for Flexible NetFlow. Flexible NetFlow extends this by allowing user-defined flow records and support for multiple protocols. Option A is false because NetFlow v5 is fixed-format and does not support templates. Option C is false because Flexible NetFlow can export using NetFlow v9 or IPFIX (NetFlow v10). Option E is false because Flexible NetFlow supports both IPv4 and IPv6.
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 version 9 uses a fixed-format packet structure for flow export.
Why it's wrong here
NetFlow v9 uses a template-based format; fixed-format is characteristic of v5.
- ✓
Flexible NetFlow is built upon the NetFlow version 9 template architecture.
Why this is correct
Flexible NetFlow uses NetFlow v9 templates to define variable-length flow records.
- ✗
Flexible NetFlow can only export data using NetFlow version 9.
Why it's wrong here
Flexible NetFlow can export using NetFlow v9 or IPFIX (v10).
- ✓
NetFlow version 9 supports user-defined flow records through templates.
Why this is correct
Templates in v9 allow flexible field definitions, enabling custom flow records.
- ✗
Flexible NetFlow only supports IPv4 traffic monitoring.
Why it's wrong here
Flexible NetFlow supports IPv4, IPv6, MPLS, and other traffic types.
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Same concept, more angles
1 more way this is tested on 300-410
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 version 9 and Flexible NetFlow export format are true? (Choose TWO.)
hard- ✓ A.NetFlow version 9 uses a template-based architecture that allows the collector to dynamically learn the fields being exported.
- B.Flexible NetFlow can only export data using NetFlow version 5 format.
- ✓ C.The default UDP port for NetFlow export is 2055.
- D.The template refresh interval is fixed at 20 minutes and cannot be changed.
- E.NetFlow version 9 supports only IPv4 flow data; IPv6 requires version 5.
Why A: NetFlow version 9 uses templates to define the format of exported data, which allows flexibility. Flexible NetFlow uses version 9 as its default export format. Version 5 has a fixed format and does not support templates. The exporter configuration includes the destination IP and UDP port (default 2055). The template refresh interval is configurable using the 'template timeout' command under the exporter. Version 9 supports both IPv4 and IPv6 in the same export stream via separate templates.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.