CompTIA Network+ is the industry’s vendor-neutral benchmark for networking fundamentals — the certification that proves you can design, configure, operate, and troubleshoot real networks, not just recite acronyms. It sits at the center of nearly every IT career path: help desk technicians use it to move up, sysadmins use it to fill gaps, and security professionals treat it as the foundation Security+ quietly assumes you already have. The current version, N10-009, reflects how networks are actually built today — cloud-connected, software-defined, and wireless-first — with expanded coverage of SD-WAN, VXLAN, zero trust, SASE/SSE, IPv6, and modern Wi-Fi alongside the timeless core of subnetting, routing, switching, and structured troubleshooting.
What the exam covers
N10-009 is organized into five domains. Two of them — Networking Concepts and Network Troubleshooting — together account for nearly half of your score, which tells you exactly what CompTIA values: strong fundamentals and the ability to diagnose problems methodically.
Networking Concepts Domain 1 · 23%
The theory everything else stands on: the OSI model and encapsulation, networking appliances and their functions, cloud concepts and connectivity options, the ports-and-protocols table you simply have to know cold, transmission media and transceivers, topologies from three-tier to spine-and-leaf, IPv4 addressing and subnetting, and the modern-environment layer — SDN, SD-WAN, VXLAN, zero trust, SASE/SSE, and IPv6 addressing.
Network Implementation Domain 2 · 20%
Building networks that work: routing technologies including BGP, OSPF, route selection, NAT/PAT, and first-hop redundancy; switching with VLANs, 802.1Q trunking, link aggregation, and spanning tree; wireless design covering channels, AP deployment models, antennas, and authentication; and the physical layer of installations — power, racks, cooling, MDF/IDF layout, and cable standards.
Network Operations Domain 3 · 19%
Running networks day to day: documentation and IPAM, lifecycle and change management, monitoring with SNMP, flow data, packet capture, and baselines, disaster recovery concepts including RPO/RTO and site strategies, the network services layer of DHCP, DNS (including DoH/DoT and DNSSEC), and NTP, and access methods from VPNs to jump boxes and out-of-band management.
Network Security Domain 4 · 14%
The security fundamentals every network professional owns: core concepts like segmentation, IAM, AAA protocols, and zero-trust thinking; the attack landscape from VLAN hopping and MAC flooding to rogue DHCP, evil twins, and on-path attacks; and the defenses that counter them — device hardening, 802.1X, dynamic ARP inspection, DHCP snooping, ACLs, and security zones.
Network Troubleshooting Domain 5 · 24%
The heaviest-weighted domain on the exam. CompTIA’s structured troubleshooting methodology, cabling and physical-layer faults from duplex mismatches to fiber bend loss and PoE budgets, service issues spanning STP loops, VLAN misassignments, DHCP exhaustion, and DNS failures, performance problems like congestion, jitter, and wireless interference, and fluency with the full toolbox — ping, traceroute, dig, iperf, packet capture, toner probes, and discovery protocols.
How our practice exam maps to the blueprint
Every attempt draws a fresh, randomized set of 90 questions from a large original question bank, stratified to the official domain weightings above — so a 90-question attempt gives you roughly 21 Networking Concepts questions, 18 on Implementation, 17 on Operations, 12 on Security, and 22 on Troubleshooting, mirroring what you’ll face on test day. Every question in the bank is tagged to its domain and written against a specific numbered objective from the official N10-009 objectives document, from subnetting drills under objective 1.7 to methodology scenarios under 5.1. Each question comes with a full explanation covering why the right answer is right and why each distractor is wrong — because the explanation you read after a miss is where the real studying happens. Retake it as often as you like; your score history tracks your progress on your results page.
CompTIA Network+ (N10-009) Practice Exam
A full-length CompTIA Network+ (N10-009) practice exam drawn from a large, blueprint-weighted question bank. Every attempt pulls a fresh randomized set of 90 questions stratified across…
Subscribe to startTrademark and content notice. CompTIA® and Network+® are registered trademarks of CompTIA, Inc. The N10-009 exam objectives, including the domain titles and weightings referenced above, are the copyrighted property of CompTIA, Inc., and are cited here for identification and educational reference only. Candidates should download the complete, official exam objectives directly from CompTIA at comptia.org.
Certifym.net is an independent study resource operated by Certifym Exam Services, LLC. We are not affiliated with, endorsed by, or sponsored by CompTIA, Inc. All practice questions, answers, and explanations on this site are original works created by Certifym; they are not actual CompTIA exam questions and are not derived from any live exam content. Use of this site does not guarantee a passing score on any certification exam. Exam details (question counts, duration, scoring, and version timelines) are subject to change by CompTIA — always verify current details on CompTIA’s official website.