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CompTIA Network+ (N10-009)

Network+ Practice Test

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Questions updated at Jul 18, 2026, 1:30 PM CDT

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Free Network+ practice questions

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150 verified questions are in the live bank. Free daily questions are selected from a rotating sample set. Unlock Pro to access the full question bank.

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Question 1 of 10
Objective 5.3 Network Troubleshooting

Users report slow Wi-Fi in an area where neighboring access points are using overlapping channels. What should the administrator adjust first?

Concept tested:
Source:Troubleshoot Connectivity in a Wireless LAN Network | Cisco
Question 2 of 10
Objective 1.4 Networking Concepts

A firewall administrator needs to permit server-to-server email traffic using TCP port 25. Which protocol is the standard for this purpose?

Concept tested:
Question 3 of 10
Objective 2.3 Network Implementation

Several access points are deployed close together, and clients report poor wireless performance from interference. Which planning step should reduce channel overlap?

Concept tested:
Question 4 of 10
Objective 2.1 Network Implementation

A security audit finds unused switch ports left in a production VLAN. Why should those ports be assigned to an untagged parking VLAN by default?

Concept tested:
Question 5 of 10
Objective 4.4 Network Security

A compromised workstation should not be able to move freely to other internal systems. Which design reduces that lateral movement?

Concept tested:
Question 6 of 10
Objective 3.2 Network Operations

A network management system (NMS) requires detailed information about newly added routers, including model, firmware, and contact metadata. Which SNMP information source provides this module-level identity data?

Concept tested:
Question 7 of 10
Objective 5.2 Network Troubleshooting

A cable test shows much lower signal strength near one end of an Ethernet run during an outage investigation. What physical issue is the most likely cause?

Concept tested:
Question 8 of 10
Objective 1.5 Networking Concepts

A team is deploying containerized applications and requires a managed orchestration service to automate scaling and deployment. Which cloud service model is most appropriate for this use case?

Concept tested:
Question 9 of 10
Objective 4.3 Network Security

Administrators need authorization policies that grant access based on job function rather than broad shared permissions. Which control is most directly related?

Concept tested:
Question 10 of 10
Objective 3.1 Network Operations

A facilities team needs a visual showing where network devices and cabling are physically located in the data center. Which diagram type should they review?

Concept tested:
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Certification page CompTIA Network+ Exam objectives Network+ exam objectives Training CompTIA CertMaster training

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Source-backed answer review

The free daily Network+ set includes crawlable question text, answer choices, correct answer labels, objective mapping, and source links. Only the first SEO card includes answer explanations and any extra learning features. Pro-only bank questions stay locked; this section mirrors only the 10 free daily questions already shown on this page.

Question 1 Users report slow Wi-Fi in an area where neighboring access points are using overlapping channels. What should the administrator adjust first?

Answer choices

  1. A. Adjusting the signal strength on access points
  2. B. Changing the frequency band
  3. C. Increasing the number of SSIDs
  4. D. Modifying the channel settings

Correct answer

Modifying the channel settings

Changing channel settings can reduce overlap and interference between nearby wireless networks.

Wrong-answer review

  • A. Adjusting the signal strength on access points: Transmit power can affect coverage, but channel overlap is corrected by channel planning.
  • B. Changing the frequency band: That wireless setting can affect RF performance, but it is not the root cause described in this scenario.
  • C. Increasing the number of SSIDs: An SSID identifies a wireless network and does not affect WAN path delay or QoS treatment.

Extra learning features

Why candidates miss this

Adjusting signal strength is a reasonable troubleshooting step, but it doesn't address the core issue of overlapping channels. Many administrators mistakenly believe increasing signal strength will solve performance problems, failing to recognize that channel interference is the primary culprit. Channel planning is the correct approach to mitigate interference and improve Wi-Fi performance in congested areas. Likely wrong answer: Adjusting the signal strength on access points Review focus: Wireless LAN Troubleshooting

Interview question

Q: Our users are complaining about slow Wi-Fi in a conference room. A network survey reveals that neighboring access points are using overlapping channels. How would you address this issue? Strong answer: I'd start by adjusting the channel settings on the access points. The goal is to minimize overlap and interference. I'd use a tool to analyze the spectrum and choose non-overlapping channels. It's important to consider the entire network, not just the conference room, to avoid creating new interference issues elsewhere. I'd also document the changes and monitor performance afterward to ensure the problem is resolved.

  • Understanding of channel overlap and interference
  • Proactive approach to network optimization
  • Consideration of network-wide impact
  • Documentation and monitoring practices

Caution: Suggesting to simply increase the number of SSIDs or adjust signal strength without addressing the root cause of channel overlap. This shows a lack of understanding of the underlying problem.

Objective/domain: Network Troubleshooting

Source: Troubleshoot Connectivity in a Wireless LAN Network | Cisco

Question 2 A firewall administrator needs to permit server-to-server email traffic using TCP port 25. Which protocol is the standard for this purpose?

Answer choices

  1. A. HTTPS
  2. B. DNS
  3. C. SMTP
  4. D. DHCP

Correct answer

SMTP

Objective/domain: Networking Concepts

Source: Service Name and Port Number Registry | IANA

Question 3 Several access points are deployed close together, and clients report poor wireless performance from interference. Which planning step should reduce channel overlap?

Answer choices

  1. A. Implement WPA2 instead of WPA3 for better compatibility
  2. B. Increase the transmission power of all access points
  3. C. Change the SSID name to match industry standards
  4. D. Plan channels using a non-overlapping set for each AP

Correct answer

Plan channels using a non-overlapping set for each AP

Objective/domain: Network Implementation

Source: WPA3 Deployment Guide | Cisco

Question 4 A security audit finds unused switch ports left in a production VLAN. Why should those ports be assigned to an untagged parking VLAN by default?

Answer choices

  1. A. To allow inter-VLAN routing without additional configuration
  2. B. To ensure that all traffic between switches uses the same VLAN ID
  3. C. To optimize bandwidth usage for voice and video traffic
  4. D. To prevent unauthorized access by defaulting to an untagged VLAN

Correct answer

To prevent unauthorized access by defaulting to an untagged VLAN

Objective/domain: Network Implementation

Source: Configure VLAN Trunks | Cisco

Question 5 A compromised workstation should not be able to move freely to other internal systems. Which design reduces that lateral movement?

Answer choices

  1. A. SIEM integration
  2. B. DMZ design
  3. C. Microsegmentation
  4. D. Zero Trust

Correct answer

Microsegmentation

Objective/domain: Network Security

Source: Cybersecurity Best Practices | CISA

Question 6 A network management system (NMS) requires detailed information about newly added routers, including model, firmware, and contact metadata. Which SNMP information source provides this module-level identity data?

Answer choices

  1. A. MODULE-IDENTITY information in the MIB
  2. B. A NetFlow exporter template
  3. C. An 802.1Q native VLAN tag
  4. D. A recursive DNS resolver cache

Correct answer

MODULE-IDENTITY information in the MIB

Objective/domain: Network Operations

Source: RFC 3411: An Architecture for Describing SNMP Management Frameworks

Question 7 A cable test shows much lower signal strength near one end of an Ethernet run during an outage investigation. What physical issue is the most likely cause?

Answer choices

  1. A. Damaged connectors at either end
  2. B. Improper termination at both ends
  3. C. Incorrect type of cable used
  4. D. Duplex mismatch between devices

Correct answer

Damaged connectors at either end

Objective/domain: Network Troubleshooting

Source: CompTIA Network+ (N10-009) exam objectives summary

Question 8 A team is deploying containerized applications and requires a managed orchestration service to automate scaling and deployment. Which cloud service model is most appropriate for this use case?

Answer choices

  1. A. IaaS (Infrastructure as a Service)
  2. B. CaaS (Container as a Service)
  3. C. SaaS (Software as a Service)
  4. D. PaaS (Platform as a Service)

Correct answer

CaaS (Container as a Service)

Objective/domain: Networking Concepts

Source: PaaS vs IaaS vs SaaS | Google Cloud

Question 9 Administrators need authorization policies that grant access based on job function rather than broad shared permissions. Which control is most directly related?

Answer choices

  1. A. RBAC
  2. B. MFA
  3. C. TACACS+
  4. D. RADIUS

Correct answer

RBAC

Objective/domain: Network Security

Source: Zero Trust Maturity Model | CISA

Question 10 A facilities team needs a visual showing where network devices and cabling are physically located in the data center. Which diagram type should they review?

Answer choices

  1. A. IP address plan
  2. B. Cable map
  3. C. Logical diagram
  4. D. Physical diagram

Correct answer

Physical diagram

Objective/domain: Network Operations

Source: IP Addresses | NetBox Documentation

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