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300-410 Practice Question: Which TWO statements about Flexible NetFlow flow…
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.
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.
- ✗
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.
- ✗
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.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
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Last reviewed: Jun 19, 2026
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