The CompTIA Network+ Study Guide: Everything You Need to Pass N10-009
If you’re looking for a CompTIA Network+ study guide, here’s the whole thing in one place: what’s actually on the N10-009 exam, how much each of the five domains counts, a step-by-step study plan built on 30 years of teaching this material, the free resources worth grabbing, and — most important — how to know you’re ready to book the exam before you spend money on a test date.
I’ll keep this practical. Network+ is the natural second rung after A+ — you proved you can fix the box; now you prove you can connect it to everything else. It’s one exam (not two, like A+), but it’s denser: five domains, real subnetting math, and a troubleshooting domain that’s the biggest slice of the test. The winning move isn’t studying harder — it’s studying the right things in the right proportions. That’s what this guide is for.
What’s in this guide
- What the Network+ is (and why it’s worth earning)
- The N10-009 exam at a glance
- The five domains, and where your hours go
- What’s new in N10-009
- How long should you study?
- The six-step study plan
- Free Network+ study resources
- Choosing your study materials
- Registering and exam day
- After you pass: what’s next
- FAQ
What the Network+ is (and why it’s worth earning)
The CompTIA Network+ certifies that you can design, configure, manage, and troubleshoot networks — the skills behind job titles like network technician, network administrator, help desk escalation, and junior network engineer. Where the A+ says “I can support the machine,” Network+ says “I can support the network the machine lives on.” Since almost nothing in IT runs without a network anymore, that’s a claim employers pay attention to.
Like the A+, it’s vendor neutral. You’re not learning one company’s router menu — you’re learning how networks actually work: cabling, switching, routing, IP addressing, wireless, cloud connectivity, and what to do when any of it breaks. Learn it once and it applies whether the badge on the rack says Cisco, Juniper, or something the vendor account manager hasn’t invented yet.
There are no prerequisites. CompTIA recommends A+ and around 9–12 months of networking experience — recommends, not requires. Plenty of people go straight at Network+, and structured practice substitutes for calendar time the same way it does on every CompTIA exam.
The N10-009 exam at a glance
| Network+ (N10-009) | |
|---|---|
| Questions | Up to 90 |
| Time | 90 minutes |
| Question types | Multiple choice + performance-based questions (PBQs) |
| Scoring scale | 100–900 |
| Passing score | 720 |
| Where | Pearson VUE testing center, or online proctored from home |
One exam, one voucher, one sitting — simpler logistics than the A+’s two-exam structure, but note the passing score: 720, higher than the A+’s 675. For an honest look at what actually makes this exam hard (spoiler: it’s the subnetting and the troubleshooting scenarios, not trick questions), see how hard the CompTIA Network+ really is.
The five domains, and where your hours go
CompTIA publishes exactly how much of the exam each domain carries, so you can budget your study hours instead of guessing:
| N10-009 domain | Share of exam | Roughly |
|---|---|---|
| Network troubleshooting | 24% | ~22 questions |
| Networking concepts | 23% | ~21 questions |
| Network implementation | 20% | ~18 questions |
| Network operations | 19% | ~17 questions |
| Network security | 14% | ~13 questions |
Look at the top row: troubleshooting is the single biggest domain. That tells you what this exam really is — not a vocabulary test, but a “something’s broken, what’s your next move?” test. Here’s what each domain actually asks:
- Networking concepts (23%) — the foundation everything else stands on: the OSI model, network appliances and their functions, cloud concepts and connectivity, ports and protocols, traffic types, transmission media, network topologies, and IPv4 addressing including subnetting. Mike teaches the OSI model as an apartment building — seven floors stacked up, with data moving between them — because once you can see the layers, “which layer does a switch work at?” stops being memorization and starts being obvious.
- Network implementation (20%) — putting networks together: routing technologies and static vs. dynamic routing, switching (VLANs, trunking, interface configuration), wireless standards and installation, and the physical side — racks, cabling, and installation factors.
- Network operations (19%) — keeping networks healthy: documentation, monitoring, SNMP and logging, backup and disaster-recovery concepts, DHCP, DNS, and NTP as services you administer (not just acronyms you define), and remote access methods.
- Network security (14%) — the smallest domain, but don’t write it off: security concepts and terminology, network attacks and their patterns, and applying defensive features — plus newer material like Zero Trust Architecture. It’s also the bridge to your next cert; more on that below.
- Network troubleshooting (24%) — the big one: a structured troubleshooting methodology, then applying it to cabling and physical problems, switching and routing issues, wireless problems, and general network service failures, using the standard software tools and commands. These questions are scenario-based, and they reward people who’ve run ping, traceroute, and nslookup against a real (or simulated) network — not just read about them.
One caution that applies to every CompTIA exam: the percentages tell you how the questions are distributed, not which topics you’re allowed to skip. A 14% domain can still sink you if you write it off.
What’s new in N10-009
If you studied networking a few years back — or you’re using an old N10-008 book someone handed you — know that N10-009 builds on the same foundation but pulls the exam toward how networks are actually built today. The additions worth knowing about:
- Cloud concepts and connectivity — network function virtualization (NFV), virtual private clouds (VPCs), and the connectivity options that link your network to the cloud: VPNs and direct connections.
- Modern security — network security groups and security lists, and Zero Trust Architecture (ZTA).
- Software-defined everything — software-defined networking, SD-WAN, and Secure Access Service Edge (SASE).
- Infrastructure as code — automation concepts like playbooks, templates, configuration drift, and compliance.
None of it changes the fundamentals — frames are still frames, subnets are still subnets. But if your study materials predate N10-009, these are the gaps, and they’re real exam content. Version-check anything you buy (ours included: the version is on every product page).
How long should you study?
Mike’s honest answer hasn’t changed in 30 years of teaching this: it depends on where you’re starting from. Coming off a fresh A+ with the networking domain still warm in your head, you’re partway there on day one. Coming in cold, the concepts domain alone — especially subnetting — deserves unhurried time. Any guide promising everyone the same “6 weeks to Network+” is selling a calendar, not a plan.
So use a readiness signal you can measure instead: you’re ready to schedule the exam when you’re consistently scoring 85% or higher on timed practice tests. That’s the line Mike has given students across the McGraw-Hill All-in-One guides and the video courses alike. Below 85%, more practice is cheaper than a retake. Above it, book the exam and stop second-guessing.
One Network+-specific note: subnetting is a skill, not a fact. You can’t read your way to it. Mike’s course spends a full chapter working subnetting problems — classes, CIDR, masks, special addresses — precisely because the exam expects you to do the math under time pressure, and the only path there is reps. Budget subnetting practice like gym time: short, regular sessions beat one heroic weekend.
The six-step study plan
- Download the N10-009 exam objectives first. Free from CompTIA’s website. Every exam question traces back to that document — it’s the map; everything else is transportation.
- Pick your core learning source. Video, book, or both — see choosing your study materials below. Work domain by domain in the exam’s proportions: troubleshooting and concepts together are nearly half the test, so that’s where the hours go.
- Get your hands on a network. The PBQs ask you to do things — configure a SOHO router, work a VLAN, order the troubleshooting steps. If you don’t have spare gear for a home lab, simulations exist for exactly this; our home-lab guide covers the cheap physical route too. Either way: run ping, ipconfig, traceroute, and nslookup yourself until the output reads like a sentence.
- Drill the subnetting until it’s boring. This is the topic that decides more Network+ outcomes than any other. Work problems daily in small doses. When you can do CIDR math without scratch paper anxiety, you’ve crossed the line.
- Take timed practice exams. Then take more. In Mike’s words: you can’t take too many practice tests. Up to 90 questions in 90 minutes is a minute a question, and a PBQ can eat five — pacing has to be automatic before test day, and the only way there is timed reps. (A structured study routine makes this a habit instead of a hope.)
- Apply the 85% rule, then schedule. Consistently at 85%+ on timed practice tests? Book it. A real date on the calendar pulls your studying forward; “someday” pushes it back.
Free Network+ study resources
- The official N10-009 exam objectives (free, comptia.org) — as above. If you came looking for a “free Network+ study guide PDF,” this is the one that actually matters, because it’s the document the exam is written from.
- Our free protocols & ports PDF — the memorization backbone of the concepts domain on one sheet. Print it, tape it to the fridge.
- The cost math — before you budget, read the complete Network+ cost breakdown, including CompTIA’s June 2026 price increase and where the real savings are.
Choosing your study materials
Mike has taught networking since the days when coax was a defensible choice, and the study system that came out of it maps to the plan above — pick the pieces that fill your gaps, tech to tech:
- TotalVideo course ($249) — Mike’s full walkthrough of every N10-009 domain, taught the way he always teaches: the everyday picture first (the OSI model as an apartment building), the exam terminology second. If you’re starting from zero, this is the core learning source.
- All-in-One Exam Guide ($38.99) — the ninth edition of our best-selling book, for people who learn by reading (or want the reference on the shelf after the exam — most techs keep it).
- TotalSims ($75) — hands-on network simulations: exactly the practice PBQs demand, and the piece free resources don’t cover.
- TotalTester practice exams ($49) — the readiness meter. Timed, real-exam-style questions so “am I at 85% yet?” has a real answer.
- Bundles — the same pieces cost less together: Sims + Tester ($112), E-book + Sims + Tester ($127), Video + Sims + Tester ($290), or the complete bundle with the exam voucher and a retake included ($580). Everything side by side on the Network+ study bundle page.
Registering and exam day
Registration works like every CompTIA exam: buy a voucher, then schedule the how, when, and where — a Pearson VUE testing center or online proctored from home. CompTIA sells vouchers at the full $399 exam price (as of June 2026), but CompTIA partners can sell them for less: our Network+ voucher is $357.99 — $41 under retail for the same exam, same seat, same cert.
And since CompTIA doesn’t do free retakes, the $105 retake option purchased with your voucher is a lot cheaper than a second full-price attempt if exam-day nerves win round one. At the testing center: photo ID, belongings stored, paper and pencil provided — which, on this exam, is where your subnetting scratch work goes the moment the clock starts.
After you pass: what’s next
Network+ is the middle rung of the classic CompTIA ladder: A+ proves you can support the machine, Network+ proves you can support the network, and Security+ opens the security-side doors — and security is where the salary curve bends upward. The Network+ security domain you just studied is the on-ramp; our Security+ study guide picks up exactly where it leaves off, and the full cybersecurity certification pathway maps the longer road.
FAQ
Is there a free CompTIA Network+ study guide PDF?
The free PDF that matters is CompTIA’s own N10-009 exam objectives booklet — free on comptia.org, and every exam question traces to it. Pair it with our free practice questions and you can gauge your starting point without spending a dime.
How many questions are on the Network+ exam?
Up to 90 questions in 90 minutes — multiple choice plus performance-based questions. Scoring runs 100–900, and you pass at 720.
Do I need A+ before Network+?
No — there are no prerequisites. CompTIA recommends A+ and 9–12 months of networking experience, but it’s a recommendation. If you’re comfortable with basic hardware and operating systems already, you can go straight at Network+; if terms like “IP address” and “router” are brand new, the A+ first makes the climb gentler.
How long does it take to study for Network+?
It depends on your starting point — a fresh A+ with the networking domain still warm shortens the road considerably. Skip the calendar math and use the readiness rule: consistently 85%+ on timed practice exams means you’re ready to schedule. And give subnetting daily reps; it’s the skill that sets the pace.
Is Network+ harder than A+?
Most students say yes — not because the format changes, but because the material goes deeper: one dense exam with real subnetting math and a troubleshooting domain that’s the biggest slice of the test, with a higher passing score (720 vs 675). Our honest difficulty breakdown covers what actually trips people up.
What’s the difference between N10-009 and N10-008?
N10-009 builds on the same foundation and adds current-practice material: cloud connectivity (NFV, VPCs, VPN and direct connections), Zero Trust Architecture, software-defined networking including SD-WAN and SASE, and infrastructure-as-code concepts like playbooks and configuration drift. If your study materials are N10-008-era, those are the gaps to close.
What happens if I fail?
You buy another voucher and try again — there are no free retakes. That’s why the retake option purchased up front ($105 vs a second $399 list-price attempt) exists, and why the 85% practice rule is the cheapest insurance there is: don’t book until your scores say you’re ready.