Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
A network team wants to collect flow-level traffic statistics from routers to identify top talkers and bandwidth consumers. Which two statements about NetFlow are correct?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
It summarizes traffic into flows instead of capturing every packet payload
NetFlow tracks metadata about flows, not full payload captures.
B
Distractor review
It is primarily used to distribute time from an authoritative clock
That describes NTP, not NetFlow.
C
Best answer
It can help identify which conversations consume the most bandwidth
Top talker and traffic-pattern visibility is a common use case.
D
Distractor review
It replaces routing protocols by advertising reachability information
NetFlow is a monitoring technology, not a routing protocol.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking NetFlow for protocols that distribute time or routing information. For example, option B incorrectly associates NetFlow with NTP, which synchronizes clocks, and option D wrongly suggests NetFlow replaces routing protocols by advertising reachability. These misconceptions arise because candidates may not clearly differentiate between monitoring technologies and control plane protocols. Remember, NetFlow only summarizes traffic flows for analysis and does not participate in routing or time synchronization. Confusing these roles can lead to selecting incorrect answers under exam pressure.
Technical deep dive
How to think about this question
NetFlow is a Cisco-developed network protocol designed to collect IP traffic information as it enters or exits an interface. Instead of capturing every packet payload, NetFlow aggregates packets into flows, which are unidirectional sequences of packets sharing common attributes such as source/destination IP addresses, ports, and protocol. This flow-based approach enables efficient monitoring and analysis of traffic patterns without the overhead of full packet capture. In the context of Cisco routers and the CCNA exam, NetFlow is primarily used for traffic analysis and network monitoring. It helps network engineers identify top talkers—hosts or conversations consuming the most bandwidth—by summarizing flow metadata like byte counts, packet counts, and timestamps. This information is crucial for capacity planning, troubleshooting congestion, and detecting anomalous traffic. NetFlow does not replace routing protocols or provide time synchronization; its role is strictly in traffic visibility. A common exam trap is confusing NetFlow with other network services such as NTP or routing protocols. Candidates might mistakenly think NetFlow distributes time or advertises routing information, but it solely collects and exports flow statistics. Practically, enabling NetFlow on Cisco devices involves configuring flow exporters and collectors, which then analyze flow records to provide actionable insights into network usage and security events.
KKey Concepts to Remember
- NetFlow collects and summarizes IP traffic into flows based on shared attributes instead of capturing full packet payloads.
- NetFlow enables network engineers to identify top talkers and bandwidth consumers by analyzing flow metadata like byte and packet counts.
- NetFlow operates as a traffic monitoring and analysis tool, not as a routing protocol or time synchronization service.
- Cisco routers export NetFlow data to collectors for capacity planning, troubleshooting, and security analysis purposes.
- NetFlow flows are unidirectional and defined by a combination of source/destination IP addresses, ports, and protocol type.
- Enabling NetFlow involves configuring flow exporters on Cisco devices to send flow records to a centralized collector.
- NetFlow does not advertise routing information or participate in network reachability decisions.
- Confusing NetFlow with NTP or routing protocols is a common exam mistake that can be avoided by understanding its monitoring role.
TExam Day Tips
- 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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
NetFlow collects and summarizes IP traffic into flows based on shared attributes instead of capturing full packet payloads.
What is the correct answer to this question?
The correct answer is: It summarizes traffic into flows instead of capturing every packet payload — NetFlow provides visibility into who is talking to whom, with what protocols and volume, making it valuable for capacity planning, troubleshooting, and security analysis.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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