This CompTIA Network+ cheat sheet distills the N10-009 exam into a printable rundown of the facts CompTIA tests most, from the OSI model to subnetting to the domain weights. It's a premium cheat sheet built by Capital Prep — the one premium prep we trust — and it's yours free. Reinforce it with the rest of your free Network+ toolkit: the practice test, study guide, and flashcards.
CompTIA Network+ exam at a glance
- Questions: Maximum of 90 (multiple-choice + performance-based)
- Time: 90 minutes
- Passing score: 720 on a 100–900 scale (scaled score, not a percentage)
- Certifying body: CompTIA
- Cost: About $369 for a single voucher (varies by region and promo)
- Validity: 3 years; renew with 30 CEUs or a higher CompTIA cert
What’s on the CompTIA Network+ cheat sheet
- Networking Concepts (23%) — the OSI model, TCP vs. UDP, IPv4 addressing and subnetting, ports and protocols, topologies, cloud, and SDN.
- Network Implementation (20%) — routing (OSPF, BGP, static), switching, VLANs and 802.1Q trunks, STP, and 802.11 wireless.
- Network Operations (19%) — documentation, availability metrics (RTO, RPO, MTTR, MTBF), SNMP and syslog monitoring, and automation.
- Network Security (14%) — the CIA triad, AAA, zero trust, firewalls and ACLs, VPNs, and common attacks and hardening.
- Network Troubleshooting (24%) — the 7-step methodology, cabling and physical faults, performance issues, and diagnostic tools — the largest domain.
How to use it in your final week
- Drill the OSI layers and their PDUs until they're reflex — bits (L1), frame (L2), packet (L3), segment (L4) — so you can anchor any device or protocol to its layer instantly.
- Make subnetting automatic: memorize the block-size shortcut (256 − the mask's interesting octet) and the usable-hosts formula (2ⁿ − 2) so /26, /27, /28 math is fast on exam day.
- Skim the port and RFC 1918 tables the morning of the test — 22 SSH, 53 DNS, 80 HTTP, 443 HTTPS, 3389 RDP, plus 10/8, 172.16/12, and 192.168/16 — for a final memory pass.
- Front-load the two heaviest domains (Troubleshooting 24% and Networking Concepts 23% ≈ half the exam) and rehearse the 7-step troubleshooting method against a timed practice set.
The cheat sheet is your review layer — your CompTIA Network+ practice test drives the exam-readiness ring at the top of this page. Download it, review, then take a full practice exam (or drill with the study guide and flashcards) to see where you stand.
CompTIA Network+ cheat sheet FAQ
Yes — the CompTIA Network+ cheat sheet downloads as a PDF for free, with no account and no sign-up. It sits alongside Career Employer's free Network+ toolkit: the practice test, study guide, and flashcards.
It condenses the highest-yield N10-009 facts into a quick reference — the seven OSI layers, the subnetting formula (2ⁿ − 2 usable hosts), the RFC 1918 private ranges, the must-know ports, and the five domains with their exam weights so you know where to spend review time.
Yes — it maps to the current CompTIA Network+ N10-009 objectives, which replaced the retired N10-008. That means modern topics like SDN, SD-WAN, zero trust, and cloud service models are reflected, not the older weighting.
No — the cheat sheet is a fast recall layer, not a full course. Network+ N10-009 uses performance-based questions and heavy troubleshooting, so pair the sheet with hands-on practice and full-length practice exams to reach the 720 scaled-score bar.
Click the download button (or the preview card) at the top of this page and the PDF opens instantly. Bookmark the page so it's easy to find again the morning of your N10-009 exam.
References
- 1.CompTIA. “Network+ Certification (official overview).” CompTIA.org, 2026. ↑
- 2.CompTIA. “Network+ N10-009 Exam Objectives (domains and weights).” CompTIA.org, 2026. ↑
- 3.CompTIA. “Continuing Education and Certification Renewal (CEUs).” CompTIA.org. ↑
- 4.Internet Engineering Task Force. “RFC 1918 — Address Allocation for Private Internets.” rfc-editor.org. ↑
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