Practice tests
Start a randomized session from 180 approved N10-009 questions. Choose an available test length and review every answer choice with a detailed explanation.
Start a Network+ practice testCertification hub
CompTIA Network+ N10-009
Build the networking foundation, practice troubleshooting decisions, and connect protocols to the systems that use them.
Study guides
Use the full N10-009 roadmap to organize all five exam domains, then open a detailed printable guide for deeper review.
Open the N10-009 study guideDetailed domain guides
Quick review
Compare monitoring evidence, troubleshooting tools, and switching features when several answers sound reasonable.
Open Network+ quick reviewsFocused comparisons
Networking references
Look up networking acronyms and common ports, then use the IPv4 subnetting guide and calculator to practice boundaries, host capacity, masks, and special-use ranges.
Study the IPv4 subnetting referenceExam structure
What N10-009 measures
Network+ combines design choices, implementation, routine operations, security, and troubleshooting. The largest domain is Network Troubleshooting, so preparation should include diagrams, commands, packet evidence, and fault isolation rather than definitions alone.
| Domain | Weight | Main decisions |
|---|---|---|
| 1.0 Networking Concepts | 23% | How traffic moves, which device or service fits, and how addressing, media, topology, cloud, and modern network designs work together. |
| 2.0 Network Implementation | 20% | How to select and configure routing, switching, wireless, and physical infrastructure. |
| 3.0 Network Operations | 19% | How to document, monitor, recover, manage services, and administer networks consistently. |
| 4.0 Network Security | 14% | How to protect access, recognize network attacks, harden devices, and apply defensive controls. |
| 5.0 Network Troubleshooting | 24% | How to isolate physical, service, performance, routing, switching, and wireless problems with evidence and appropriate tools. |