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300-410 Practice Question: Runs the following command to verify NetFlow data…
A network engineer runs the following command to verify NetFlow data export format:
R1# show flow exporter EXPORTER-1
Flow Exporter: EXPORTER-1 Transport Configuration: Destination IP address: 192.168.1.100 Source IP address: 10.0.0.1 Transport Protocol: UDP Destination Port: 2055 Source Port: 51234 DSCP: 0x00 TTL: 255 Output Features: Used Export Protocol: NetFlow Version 9 Template Data Export Timeout: 1800 seconds Option Data Export Timeout: 1800 seconds Option Data Configured: application-table sub-application-table application-attributes
What does this output indicate?
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
✓
The exporter is configured to send NetFlow version 9 data with application option data, indicating NBAR integration.
The output shows the configuration of a Flexible NetFlow exporter. It uses UDP to send NetFlow version 9 data to 192.168.1.100 on port 2055. It also exports option data like application tables and attributes, which are used for NBAR-based application recognition.
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 exporter uses TCP to ensure reliable delivery of flow records.
Why it's wrong here
The output lists Transport Protocol: UDP, so delivery is unreliable and unacknowledged; TCP never appears. UDP export is deliberate because flow records are high-volume telemetry where lost datagrams are tolerable. TCP would be chosen only when every record must arrive, such as billing or compliance export to a collector requiring acknowledged delivery.
- ✓
The exporter is configured to send NetFlow version 9 data with application option data, indicating NBAR integration.
Why this is correct
The output lists application-table, sub-application-table and application-attributes under Option Data Configured, alongside Export Protocol NetFlow Version 9. Those application option tables are exported by NBAR, confirming the exporter sends version 9 flow records enriched with application recognition data.
- ✗
The exporter is not sending any option data.
Why it's wrong here
The output lists three configured option data tables (application-table, sub-application-table, application-attributes), so option data is being exported. The option is tempting because the Option Data Export Timeout line could be misread as inactivity, but that value is the periodic resend interval, not an indication that no option data is sent.
- ✗
The exporter uses a destination port of 514.
Why it's wrong here
The Transport Configuration section states Destination Port: 2055, not 514. Port 514 is syslog, a different service entirely. The option is tempting because both are well-known UDP ports, but the command output explicitly names 2055, and the exporter's destination port is configured independently of any syslog setting on the device.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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