The answer is an SNMP management tool. This is correct because Simple Network Management Protocol (SNMP) allows a management station to query a device’s SNMP agent for specific Object Identifiers (OIDs) that store hardware details like the switch model and firmware version, all without physical access. On the CompTIA A+ Core 1 220-1201 exam, this question tests your understanding of remote management protocols and the distinction between tools that actively query for structured data versus those that passively capture or scan. A common trap is confusing a packet analyzer or port scanner with an SNMP tool—remember, a packet analyzer only shows raw traffic, while SNMP directly retrieves the exact information from the device’s MIB. For a memory tip: think of SNMP as the “phone call” to the device’s brain, asking for its ID card, whereas a scanner just knocks on the door to see if it’s open.
220-1201 Networking Tools Practice Question
This 220-1201 practice question tests your understanding of networking tools. 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 needs to determine the exact model and firmware version of a switch located in a remote wiring closet without physically visiting the site. The switch is configured with an IP address on the management VLAN. Which tool can be used to query the switch's SNMP agent for this information?
Why wrong: A packet analyzer captures network traffic for analysis but does not actively query SNMP agents unless combined with other tools.
B
SNMP management tool
An SNMP management tool can send GET requests to the switch's SNMP agent to retrieve device information such as model and firmware version.
C
Port scanner (e.g., Nmap)
Why wrong: A port scanner can detect open ports, including SNMP port 161, but it does not query SNMP for detailed device information without additional scripting.
D
Wi-Fi analyzer
Why wrong: A Wi-Fi analyzer is used for wireless signal analysis and is irrelevant for querying a wired switch's SNMP data.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
SNMP management tool
SNMP (Simple Network Management Protocol) allows querying network devices for information like model, firmware, and status. An SNMP manager or MIB browser can retrieve this data. A packet analyzer captures traffic but doesn't query specific OIDs. A port scanner only shows open ports, and a Wi-Fi analyzer is for wireless.
Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Packet analyzer (e.g., Wireshark)
Why it's wrong here
A packet analyzer captures network traffic for analysis but does not actively query SNMP agents unless combined with other tools.
✓
SNMP management tool
Why this is correct
An SNMP management tool can send GET requests to the switch's SNMP agent to retrieve device information such as model and firmware version.
Related concept
Access ports place end devices into a single VLAN.
✗
Port scanner (e.g., Nmap)
Why it's wrong here
A port scanner can detect open ports, including SNMP port 161, but it does not query SNMP for detailed device information without additional scripting.
✗
Wi-Fi analyzer
Why it's wrong here
A Wi-Fi analyzer is used for wireless signal analysis and is irrelevant for querying a wired switch's SNMP data.
Common exam traps
Common exam trap: an active trunk can still block the VLAN you need
A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.
Detailed technical explanation
How to think about this question
VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.
KKey Concepts to Remember
Access ports place end devices into a single VLAN.
Trunk ports carry multiple VLANs between switches.
Allowed VLAN lists decide which VLANs can cross a trunk.
Native VLAN mismatch can create confusing symptoms.
TExam Day Tips
→Use show vlan brief to verify access VLANs.
→Use show interfaces trunk to verify trunk state and allowed VLANs.
→Do not treat every same-VLAN issue as a routing problem.
Key takeaway
A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 220-1201 questions on switching, trunking, and access-port configuration.
Networking Tools — This question tests Networking Tools — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: SNMP management tool — SNMP (Simple Network Management Protocol) allows querying network devices for information like model, firmware, and status. An SNMP manager or MIB browser can retrieve this data. A packet analyzer captures traffic but doesn't query specific OIDs. A port scanner only shows open ports, and a Wi-Fi analyzer is for wireless.
What should I do if I get this 220-1201 question wrong?
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 220-1201 questions on switching, trunking, and access-port configuration.
What is the key concept behind this question?
Access ports place end devices into a single VLAN.
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