- A
SNMP
SNMP uses MIBs to expose interface counters, which a management station can poll (SNMP GET requests) to calculate bandwidth utilization over time.
- B
Syslog
Why wrong: Syslog is used for collecting event logs, not for polling performance counters. It is a push-based protocol, not pull.
- C
NetFlow
Why wrong: NetFlow provides detailed flow-level traffic data (conversations), not raw interface byte counters. It is better suited for traffic analysis than simple bandwidth monitoring.
- D
ICMP
Why wrong: ICMP is used for diagnostic tools like ping and traceroute. It does not provide interface utilization data.
Question 202 of 520
N10-009 Network Operations Practice Question
This N10-009 practice question tests your understanding of network operations. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 wants to centrally monitor the bandwidth utilization on a router's serial interface over time. The monitoring tool needs to periodically poll the router for current interface counters. Which protocol should be used for this polling?
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
✓
SNMP
SNMP (Simple Network Management Protocol) is the correct choice because it is specifically designed for polling network devices to retrieve operational statistics such as interface counters (e.g., ifInOctets, ifOutOctets) from a Management Information Base (MIB). The network administrator can configure an SNMP manager to periodically poll the router's serial interface OIDs, enabling centralized bandwidth utilization monitoring over time.
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.
- ✓
SNMP
Why this is correct
SNMP uses MIBs to expose interface counters, which a management station can poll (SNMP GET requests) to calculate bandwidth utilization over time.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Syslog
Why it's wrong here
Syslog is used for collecting event logs, not for polling performance counters. It is a push-based protocol, not pull.
When this WOULD be correct
Syslog would be correct if the question asked for a protocol to receive unsolicited log messages from network devices, such as error events or security alerts, for central monitoring and alerting.
- ✗
NetFlow
Why it's wrong here
NetFlow provides detailed flow-level traffic data (conversations), not raw interface byte counters. It is better suited for traffic analysis than simple bandwidth monitoring.
When this WOULD be correct
A network administrator wants to analyze traffic patterns and identify top talkers on a router's serial interface over time. The monitoring tool needs to collect detailed flow records (source/destination IP, ports, protocols) for traffic engineering. NetFlow would be the correct protocol.
- ✗
ICMP
Why it's wrong here
ICMP is used for diagnostic tools like ping and traceroute. It does not provide interface utilization data.
When this WOULD be correct
A question asking which protocol is used to test basic connectivity between two hosts, such as verifying if a remote device is reachable, would have ICMP as the correct answer.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓SNMPCorrect answer▾
Why this is correct
SNMP uses MIBs to expose interface counters, which a management station can poll (SNMP GET requests) to calculate bandwidth utilization over time.
✗SyslogWrong answer — click to see why▾
Why this is wrong here
Syslog is used for logging and event messages, not for polling interface counters. It is a push-based protocol, whereas the question requires a pull-based mechanism to periodically poll for bandwidth utilization data.
★ When this WOULD be the correct answer
Syslog would be correct if the question asked for a protocol to receive unsolicited log messages from network devices, such as error events or security alerts, for central monitoring and alerting.
Why candidates choose this
Candidates may confuse Syslog with SNMP because both are used for network monitoring, but Syslog is for event logging, not for polling performance metrics like bandwidth utilization.
✗NetFlowWrong answer — click to see why▾
Why this is wrong here
NetFlow is used for traffic flow analysis and accounting, not for polling interface counters like bandwidth utilization. It exports flow data to a collector, whereas the question requires periodic polling of counters, which is SNMP's function.
★ When this WOULD be the correct answer
A network administrator wants to analyze traffic patterns and identify top talkers on a router's serial interface over time. The monitoring tool needs to collect detailed flow records (source/destination IP, ports, protocols) for traffic engineering. NetFlow would be the correct protocol.
Why candidates choose this
Candidates may confuse NetFlow's traffic monitoring capability with bandwidth monitoring, assuming it can provide utilization data. They might overlook that NetFlow is flow-based and not designed for polling interface counters like SNMP does.
✗ICMPWrong answer — click to see why▾
Why this is wrong here
ICMP is used for network diagnostics like ping and traceroute, not for polling interface counters or bandwidth utilization over time.
★ When this WOULD be the correct answer
A question asking which protocol is used to test basic connectivity between two hosts, such as verifying if a remote device is reachable, would have ICMP as the correct answer.
Why candidates choose this
Candidates may confuse ICMP's role in network monitoring (e.g., ping for reachability) with the need to poll interface statistics, assuming ICMP can provide bandwidth data.
Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The N10-009 exam often tests the distinction between polling (SNMP) and push-based reporting (Syslog, NetFlow), and the trap here is that candidates confuse NetFlow's flow export capability with simple interface counter polling, or assume Syslog can be used for periodic data retrieval.
Detailed technical explanation
How to think about this question
SNMP polling relies on GetRequest and GetNextRequest PDUs to read specific OIDs from the device's MIB, such as ifHCInOctets (RFC 2863) for high-speed interfaces. The polling interval must be carefully chosen to avoid excessive CPU load on the router; many production networks use a 5-minute polling cycle for serial interfaces. Real-world tools like PRTG or SolarWinds use SNMPv2c or SNMPv3 for secure polling, and the data is stored in a round-robin database for historical trending.
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 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
Got this wrong? Here's your next step.
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
Questions learners often ask
What does this N10-009 question test?
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: SNMP — SNMP (Simple Network Management Protocol) is the correct choice because it is specifically designed for polling network devices to retrieve operational statistics such as interface counters (e.g., ifInOctets, ifOutOctets) from a Management Information Base (MIB). The network administrator can configure an SNMP manager to periodically poll the router's serial interface OIDs, enabling centralized bandwidth utilization monitoring over time.
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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Last reviewed: Jun 11, 2026
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