- A
A flow record defines which fields are matched (key fields) and which fields are collected (non-key fields).
Flow records specify key fields for flow identification and non-key fields for data collection.
- B
Flexible NetFlow flow records can only match on Layer 3 and Layer 4 fields.
Why wrong: Flexible NetFlow can also match on Layer 2 fields such as source/destination MAC addresses.
- C
A flow record must contain at least one key field and cannot contain non-key fields.
Why wrong: Flow records can contain both key and non-key fields; non-key fields are optional.
- D
Flow records can collect fields such as packet count, byte count, and first/last packet timestamps.
These are common non-key fields collected in Flexible NetFlow flow records.
- E
Flexible NetFlow flow records are only supported for IPv4 traffic.
Why wrong: Flexible NetFlow supports IPv4, IPv6, MPLS, and other traffic types.
Quick Answer
The correct answer is that Flexible NetFlow flow records can collect fields such as packet count, byte count, and first/last packet timestamps. This is true because Flexible NetFlow allows you to define custom flow records that separate key fields—used for matching traffic, like IP addresses or ports—from non-key fields, which are the collected metrics like byte and packet counts or timestamps. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of how Flexible NetFlow differs from traditional NetFlow by offering granular, user-defined flow records that can match on Layer 2, 3, and 4 fields, not just IPv4. A common trap is assuming Flexible NetFlow records are limited to Layer 3 or IPv4, but they also support IPv6 and MPLS, and can include both key and non-key fields. Remember the memory tip: “Keys match, non-keys collect”—if it’s a count or timestamp, it’s a non-key field.
300-410 NetFlow and Flexible NetFlow Practice Question
This 300-410 practice question tests your understanding of netflow and flexible netflow. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO statements about Flexible NetFlow flow records 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
A flow record defines which fields are matched (key fields) and which fields are collected (non-key fields).
Flexible NetFlow allows user-defined flow records that can match on Layer 2, 3, and 4 fields, such as MAC addresses, IP addresses, and TCP/UDP ports. Additionally, flow records can collect non-key fields like packet and byte counts, timestamps, and interface counters. Option B is false because Flexible NetFlow can also match on Layer 2 fields. Option C is false because flow records can include both key and non-key fields. Option E is false because Flexible NetFlow records are not limited to IPv4; they can also support IPv6 and MPLS.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A flow record defines which fields are matched (key fields) and which fields are collected (non-key fields).
Why this is correct
Flow records specify key fields for flow identification and non-key fields for data collection.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Flexible NetFlow flow records can only match on Layer 3 and Layer 4 fields.
Why it's wrong here
Flexible NetFlow can also match on Layer 2 fields such as source/destination MAC addresses.
- ✗
A flow record must contain at least one key field and cannot contain non-key fields.
Why it's wrong here
Flow records can contain both key and non-key fields; non-key fields are optional.
- ✓
Flow records can collect fields such as packet count, byte count, and first/last packet timestamps.
Why this is correct
These are common non-key fields collected in Flexible NetFlow flow records.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Flexible NetFlow flow records are only supported for IPv4 traffic.
Why it's wrong here
Flexible NetFlow supports IPv4, IPv6, MPLS, and other traffic types.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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NetFlow and Flexible NetFlow — study guide chapter
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FAQ
Questions learners often ask
What does this 300-410 question test?
NetFlow and Flexible NetFlow — This question tests NetFlow and Flexible NetFlow — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A flow record defines which fields are matched (key fields) and which fields are collected (non-key fields). — Flexible NetFlow allows user-defined flow records that can match on Layer 2, 3, and 4 fields, such as MAC addresses, IP addresses, and TCP/UDP ports. Additionally, flow records can collect non-key fields like packet and byte counts, timestamps, and interface counters. Option B is false because Flexible NetFlow can also match on Layer 2 fields. Option C is false because flow records can include both key and non-key fields. Option E is false because Flexible NetFlow records are not limited to IPv4; they can also support IPv6 and MPLS.
What should I do if I get this 300-410 question wrong?
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 19, 2026
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.
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