N10-009 CompTIA Network+ Certification Exam Free Practice Exam Questions (2026 Updated)

The ping results show intermittent connectivity (50% packet loss) with highly variable latency, which commonly indicates a Layer 1/Layer 2 problem (e.g., damaged cable pairs, bad patch-panel termination, failing switch port, duplex/negotiation issues, or excessive errors on the interface). Because the facility has incomplete documentation, the technician’s first priority at the switch is to positively identify the correct switch port and cable path associated with the file server before making disruptive changes.

Using a tone generator and probe aligns with Network+ troubleshooting objectives that emphasize selecting the appropriate tool and following an efficient, structured process: identify the problem, establish a theory, test, and then implement the least disruptive fix. Toning/probing helps map the server’s drop to the switch port (even through patch panels) so the technician can then check that specific interface for errors/discards, CRCs, speed/duplex negotiation status, and link stability—all without rebooting the switch or immediately replacing hardware.

By contrast, restarting the switch is high-impact, and replacing a cable is a change best performed after the correct run/port is confirmed.

A /25 subnet mask means 25 bits are reserved for the network portion, leaving 7 bits for host addresses. In dotted decimal, that is:

11111111.11111111.11111111.10000000

Decimal equivalent: 255.255.255.128

A. 255.255.254.0 corresponds to /23.

B. 255.255.255.1 is invalid as a subnet mask.

D. 255.255.255.192 corresponds to /26.

Thus, the correct subnet mask for a /25 network is 255.255.255.128.

References (CompTIA Network+ N10-009):

Domain: Networking Concepts — Subnetting, CIDR notation, dotted decimal.

Multitenancy is a cloud computing architecture where a single instance of software serves multiple customers or tenants. Each tenant ' s data is isolated and remains invisible to other tenants. Hosting a company application in the cloud to be available for both internal and third- party users fits this concept, as it allows shared resources and infrastructure while maintaining data separation and security. References: CompTIA Network+ Exam Objectives and official study guides.

Least privilege network access is a principle that restricts users ' access rights to only what is necessary for them to perform their job functions. In this case, the accountant ' s access is limited to only the financial department ' s shared folders, ensuring that they cannot access other parts of the network unnecessarily. This reduces the risk of unauthorized access and potential data breaches. References: CompTIA Network+ Exam Objectives and official study guides.

When dealing with troubleshooting and change management, the plan of action outlines the steps, risks, and mitigation strategies. A change advisory board (CAB) uses this documented plan to decide whether to approve the change.

A. Identify the problem is the first step in troubleshooting, not decision-making for CAB.

B. Develop a theory is diagnostic work, not planning.

C. Test the theory confirms causes but doesn’t provide actionable planning information.

References (CompTIA Network+ N10-009):

Domain: Network Operations — Change management, troubleshooting methodology, CAB processes.

A Content Delivery Network (CDN) stores cached versions of content in edge locations to deliver data faster and more reliably to users based on geographical proximity.

From Andrew Ramdayal’s guide:

“CDNs distribute content to multiple, geographically dispersed servers. This enhances performance and reliability for end-users by reducing latency and load times.”

WPA2/WPA3 mixed mode provides compatibility for older devices (that only support WPA2) while allowing newer devices to take advantage of stronger WPA3 encryption. This ensures maximum compatibility and security in a mixed-device environment.

A. WPA3 only is most secure but not compatible with legacy devices.

B. WPA2 only is secure but does not future-proof against WPA3-capable devices.

D. WPA/WPA2 mixed mode is weaker due to WPA (deprecated, insecure).

References (CompTIA Network+ N10-009):

Domain: Network Security — Wi-Fi encryption standards, WPA2 vs WPA3, mixed-mode compatibility.

A /23 subnet provides 512 total addresses, of which 510 are usable (subtracting 2 for network and broadcast addresses). This would satisfy the need for 255 additional addresses.

The best answer is C. Link aggregation . The requirements point directly to combining multiple physical links into one logical connection. Link aggregation provides higher total bandwidth , supports redundancy if one member link fails, and simplifies administration because the bundle is managed as a single logical interface instead of several separate ones.

Another important clue is vendor interoperability . Standards-based link aggregation, such as LACP , is designed to work across different vendors when supported properly. That makes it a strong match for inter-data-center switch environments where equipment may not all come from the same manufacturer.

The other choices do not satisfy the full requirement list. Spanning tree helps prevent loops, but it can block redundant links instead of actively using them for extra bandwidth. Setting interface speeds to 10GB increases speed per port, but it does not by itself provide the logical bundling, simplified management, or redundancy benefits described. Jumbo frames can improve efficiency for some traffic types, but they are not the right answer for bandwidth aggregation and resilient uplinks.

Because the question asks for a solution that improves throughput, keeps redundancy, remains cost effective, and is easier to manage, link aggregation is the strongest fit.