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Free CompTIA Network+ Practice Test (N10-009)

Not sure if you are ready for Network+? Take a free, timed CompTIA Network+ practice test. This 25-question diagnostic is spread across all five N10-009 domains at the official weighting, so your result maps to where the real exam will test you. You get your score and a domain-by-domain breakdown immediately, so you can see exactly where you stand before you spend a cent.

By PrepClubs Editorial Team, updated April 18, 2026

Questions

Time Limit

90 min

Difficulty

Medium

Access

30 days

Full access

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What this free Network+ practice includes

A timed, 25-question diagnostic drawn from the same original bank as the full product. The 25 items are distributed to mirror the real N10-009 blueprint: heavier on Network Troubleshooting and Networking Concepts, lighter on Network Security, so the mix reflects the live exam rather than a random sample.

At the end you get a score, a domain-by-domain breakdown, and a clear rationale for every question that explains why the correct answer is correct and why the others are wrong. That is the point of a real diagnostic: it shows you which two domains to attack first, not just a number.

All five domains sampled

Networking Concepts, Network Implementation, Network Operations, Network Security, and Network Troubleshooting, at the official weighting.

Original questions, current objectives

Written by PrepClubs to the N10-009 Exam Objectives. Not real exam items and not scraped dumps.

Instant domain breakdown

See your score split by domain the moment you finish, so you know exactly where to focus.

A rationale for every answer

We explain the reasoning, not just the letter, so you build exam judgment rather than memorizing.

Pass Guarantee on the full bank

Upgrade and if you sit the exam within your access window and do not pass, we extend your access another 30 days free.

Three sample Network+ questions with walkthroughs

N10-009 rewards reading the scenario carefully and picking the best action, tool, or value, not just a correct one. Read every option.

Sample 1: Networking Concepts

A technician needs to subnet the 192.168.10.0/24 network so that each subnet supports at least 50 usable hosts while creating as many subnets as possible. Which subnet mask should they use?

A./25 (255.255.255.128)
B./26 (255.255.255.192)
C./27 (255.255.255.224)
D./28 (255.255.255.240)

Answer and walkthrough

B. A /26 gives 2 to the 6th power, or 64 addresses per subnet, which is 62 usable hosts after removing the network and broadcast addresses. That satisfies the 50-host requirement while creating four subnets, the most possible while still meeting the host count. A /25 gives 126 usable hosts but only two subnets, fewer than /26. A /27 gives only 30 usable hosts, below the 50 required, and /28 gives 14, far too few. On N10-009, subnetting questions want the mask that meets the host requirement and maximizes subnet count, so compute usable hosts first, then pick the tightest fit.

Sample 2: Network Troubleshooting

Users on one floor report that the network is down. A technician confirms the switch has power and link lights are lit. Following the CompTIA troubleshooting methodology, what should the technician do next after identifying the problem?

A.Implement a fix by replacing the switch
B.Establish a theory of probable cause
C.Document the findings and outcome
D.Escalate the issue to the vendor

Answer and walkthrough

B. The methodology order is identify the problem, establish a theory of probable cause, test the theory, establish a plan of action, implement the solution, verify full functionality, and document. The problem is identified, so establishing a theory of probable cause is the next step. Implementing a fix or replacing hardware comes only after a theory is tested and a plan is set, and documentation is the final step. Escalation is not part of the core sequence. Ordering questions are common on N10-009: pick the next step in the methodology, not the eventual one.

Sample 3: Network Implementation

A network administrator needs to carry traffic for several VLANs across a single link between two switches. Which configuration should they apply to that link?

A.Configure the port as an access port for the native VLAN
B.Configure the port as an 802.1Q trunk
C.Enable port security on the link
D.Configure the port for port aggregation with LACP

Answer and walkthrough

B. An 802.1Q trunk tags frames with their VLAN ID so a single physical link can carry traffic for multiple VLANs between switches. An access port belongs to one VLAN only and cannot carry several. Port security limits which MAC addresses may use a port and does nothing to carry multiple VLANs. Port aggregation with LACP bundles links for more bandwidth or redundancy but does not by itself tag VLAN traffic. Match the stated goal, carrying multiple VLANs over one link, to the control designed for it: the trunk.

What the real Network+ exam feels like

The CompTIA Network+ N10-009 exam is delivered at a Pearson VUE test center or through online proctoring. You face a maximum of 90 questions in 90 minutes, a mix of multiple-choice and performance-based questions (PBQs). The passing score is 720 on a scaled range of 100 to 900, and scoring is weighted, so harder items count for more and there is no per-domain minimum.

PBQs usually appear first and take longer than a single multiple-choice item. The common mistake is sinking too much time into them at the start. Flag them, move through the multiple-choice items to bank quick points, then return with the time you have left. This free diagnostic is multiple-choice so you can benchmark fast, and the full bank adds PBQ-style items rendered as text.

Network Troubleshooting is the single heaviest domain at 24 percent, followed closely by Networking Concepts at 23 percent. If your free diagnostic breakdown shows a gap in either of those, that is where the most exam points are and where your prep time pays back the most.