This N10-009 practice question tests your understanding of network operations. 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.
A network administrator is investigating reports of slow network performance. Which tool should the administrator use to capture and analyze individual packets to identify the cause of the latency?
A
Why wrong: NetFlow provides flow-level statistics but does not capture full packet contents for detailed analysis.
B
Why wrong: SNMP is used for monitoring device status and collecting metrics, not for packet-level analysis.
C
Why wrong: Syslog collects log messages from devices but does not capture network traffic.
D
A protocol analyzer captures and displays the contents of packets, enabling detailed troubleshooting of latency issues.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
D
Option D is correct because a packet analyzer (e.g., Wireshark, tcpdump) captures and decodes individual packets, allowing the administrator to inspect frame-level details, identify retransmissions, TCP window scaling issues, or application-layer delays that cause latency. Unlike aggregate monitoring tools, packet analysis provides the granularity needed to pinpoint the exact cause of slow performance.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
A
Why it's wrong here
NetFlow provides flow-level statistics but does not capture full packet contents for detailed analysis.
B
Why it's wrong here
SNMP is used for monitoring device status and collecting metrics, not for packet-level analysis.
C
Why it's wrong here
Syslog collects log messages from devices but does not capture network traffic.
D
Why this is correct
A protocol analyzer captures and displays the contents of packets, enabling detailed troubleshooting of latency issues.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates confuse a packet analyzer with a throughput tester (Option A), assuming that measuring bandwidth alone will reveal latency causes, when in fact packet-level inspection is required to identify retransmissions, windowing issues, or application-layer delays.
Detailed technical explanation
Packet analyzers operate by placing the network interface into promiscuous mode to capture all frames on the segment, then reassemble TCP streams and decode protocols up to Layer 7. For latency troubleshooting, the analyzer can highlight TCP retransmissions (indicating packet loss), duplicate ACKs, or excessive round-trip time (RTT) variations, which are invisible to throughput tests or logs. In a real-world scenario, a single misconfigured firewall rule causing out-of-order delivery would be immediately visible in a packet capture but completely missed by a speed test.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the N10-009 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Network Operations — This question tests Network Operations — Read the scenario before looking for a memorised answer..
The correct answer is: D — Option D is correct because a packet analyzer (e.g., Wireshark, tcpdump) captures and decodes individual packets, allowing the administrator to inspect frame-level details, identify retransmissions, TCP window scaling issues, or application-layer delays that cause latency. Unlike aggregate monitoring tools, packet analysis provides the granularity needed to pinpoint the exact cause of slow performance.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This N10-009 practice question is part of Courseiva's free CompTIA 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 N10-009 exam.
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