The answer is that the output indicates two active Flexible NetFlow cache entries, each displaying key flow metadata including source and destination IP addresses, protocol type, byte and packet counters, and sys-uptime timestamps for the first and last packets. This is correct because the `show flow monitor cache format record` command displays the contents of the NetFlow cache in a human-readable, record-oriented format, revealing exactly which flows are currently being tracked and their traffic characteristics. On the Cisco CCNP ENARSI 300-410 exam, this command tests your ability to interpret Flexible NetFlow cache entries and distinguish between active flow records—a common trap is confusing the `cache format record` output with the aggregated `cache format table` view, which omits per-flow timestamps. Remember that protocol numbers 6 and 17 correspond to TCP and UDP respectively, and the timestamps reflect system uptime in milliseconds, not absolute time. A helpful memory tip is "FIRST and LAST tell you the flow’s lifespan, while BYTES and PACKETS show its weight."
300-410 NetFlow and Flexible NetFlow Practice Question
This 300-410 practice question tests your understanding of netflow and flexible netflow. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A network engineer runs the following command to verify Flexible NetFlow cache entries:
R1# show flow monitor FLOW-MONITOR-1 cache format record
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The cache shows two flows with source/destination IP, protocol, byte/packet counts, and timestamps.
The output shows two active flows in the Flexible NetFlow cache. Flow 1 is a TCP (protocol 6) flow from 10.0.0.1 to 192.168.1.100 with 1500 bytes and 10 packets. Flow 2 is a UDP (protocol 17) flow from 10.0.0.2 to 192.168.1.101 with 500 bytes and 5 packets. The timestamps show the first and last packet times.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
The cache shows two flows with source/destination IP, protocol, byte/packet counts, and timestamps.
Why this is correct
The output correctly displays all the fields defined in the flow record for both flows.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The cache does not include protocol information.
Why it's wrong here
Protocol information (6 for TCP, 17 for UDP) is included.
✗
The flows are being exported immediately.
Why it's wrong here
The output shows cache entries, not export status.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
The output shows cache entries, not export status.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
NetFlow and Flexible NetFlow — This question tests NetFlow and Flexible NetFlow — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The cache shows two flows with source/destination IP, protocol, byte/packet counts, and timestamps. — The output shows two active flows in the Flexible NetFlow cache. Flow 1 is a TCP (protocol 6) flow from 10.0.0.1 to 192.168.1.100 with 1500 bytes and 10 packets. Flow 2 is a UDP (protocol 17) flow from 10.0.0.2 to 192.168.1.101 with 500 bytes and 5 packets. The timestamps show the first and last packet times.
What should I do if I get this 300-410 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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