The answer is to use SNMP polling with a suitable MIB to collect latency metrics at regular intervals. This approach is correct because SNMP polling provides continuous, periodic data collection at configurable intervals, allowing the NOC to store historical latency metrics in a management system for trend analysis over a week. Unlike SNMP traps, which are event-driven and only report anomalies as they occur, polling generates the consistent dataset needed to identify patterns in WAN latency. On the CompTIA Network+ N10-009 exam, this question tests your understanding of how SNMP operations differ for monitoring versus alerting—a common trap is choosing traps for trend analysis, but traps lack the periodic sampling required. Remember the memory tip: “Poll for patterns, trap for problems.”
N10-009 Network Operations Practice Question
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.
An NOC technician receives an alert that latency on a critical WAN link has increased significantly. The technician needs to analyze the latency trend over the past week to identify patterns. Which approach is the most efficient for gathering this historical data?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use SNMP polling with a suitable MIB to collect latency metrics at regular intervals
SNMP polling with a suitable MIB (e.g., IF-MIB for interface statistics or IP-MIB for performance metrics) allows the NOC to collect latency data at regular, configurable intervals over time. This historical data can be stored in a management system and analyzed for trends, making it the most efficient method for identifying patterns in WAN latency over a week. SNMP traps, by contrast, are event-driven and do not provide the continuous, periodic data needed for trend analysis.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use SNMP traps to alert on each latency spike
Why it's wrong here
SNMP traps are unsolicited notifications for immediate events, not suitable for collecting continuous historical data.
✓
Use SNMP polling with a suitable MIB to collect latency metrics at regular intervals
Why this is correct
Polling gathers data at set intervals, which can be stored for trend analysis. This is the standard method for historical performance monitoring.
Related concept
Read the scenario before looking for a memorised answer.
✗
Run a continuous ping test and manually log timestamps
Why it's wrong here
Manual logging is inefficient and error-prone; automated monitoring is preferred.
✗
Use traceroute to identify each hop and measure latency per hop
Why it's wrong here
Traceroute provides a snapshot of the path and per-hop latency but is not designed for continuous historical trend data.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse SNMP traps (event-driven alerts) with SNMP polling (periodic data collection), assuming traps can provide historical trend data when they are designed only for real-time notifications.
Detailed technical explanation
How to think about this question
SNMP polling works by sending GET requests to a network device's MIB (Management Information Base), which contains OIDs (Object Identifiers) like ifInOctets or ipNetToMediaPhysAddress. For latency, a common approach is to poll the device's ICMP echo response time via a custom MIB or use the device's own latency statistics (e.g., from a performance monitoring MIB like RFC 2925). In real-world NOCs, this data is fed into a time-series database (e.g., Prometheus or InfluxDB) to generate graphs and detect anomalies, such as latency spikes during business hours.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 N10-009 question in full detail.
Network Operations — This question tests Network Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use SNMP polling with a suitable MIB to collect latency metrics at regular intervals — SNMP polling with a suitable MIB (e.g., IF-MIB for interface statistics or IP-MIB for performance metrics) allows the NOC to collect latency data at regular, configurable intervals over time. This historical data can be stored in a management system and analyzed for trends, making it the most efficient method for identifying patterns in WAN latency over a week. SNMP traps, by contrast, are event-driven and do not provide the continuous, periodic data needed for trend analysis.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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