CompTIAAssociate Level2026 Updated

CompTIA Network+ N10-009 Exam Guide 2026: Everything You Need to Pass

Updated May 1, 202612 min readWritten by Certsqill experts

Quick facts — N10-009

Exam cost

$338 USD

Questions

Up to 90 items

Time limit

90 minutes

Passing score

720 / 900

Valid for

3 years (CE)

Testing

Pearson VUE

Who this exam is for

The CompTIA Network+ N10-009 certification is designed for professionals who work with or want to work with CompTIA technologies in a professional capacity. It is taken by cloud engineers, DevOps practitioners, IT administrators, and technical professionals looking to validate their expertise.

You do not need extensive prior experience to attempt it, but you will benefit from hands-on familiarity with the subject matter. The exam tests applied knowledge and architectural judgment, not just memorization. If you can reason about trade-offs and real-world scenarios, structured practice will handle the rest.

Domain breakdown

The N10-009 exam is built around official domains, each with a fixed percentage of the question pool. This distribution should directly inform how you allocate your study time.

Domain

Weight

Focus areas

Networking Concepts

23%

OSI and TCP/IP models, network topologies, network types (LAN, WAN, MAN, PAN, WLAN), IPv4/IPv6 addressing and subnetting, common ports and protocols (DNS, DHCP, HTTP/S, SSH, FTP, SMTP, SNMP).

Network Implementation

20%

Ethernet switching (VLANs, trunking, STP/RSTP), wireless standards (802.11ax/ac/n), AP configuration, cable types (UTP, SFP, fiber), routing protocols (OSPF, RIP, BGP overview), SD-WAN concepts.

Network Operations

17%

Network monitoring tools (SNMP, NetFlow, syslog, MRTG), documentation (network diagrams, IP address management), network segmentation, bandwidth management, and performance baselines.

Network Security

20%

Common network attacks (DoS, MITM, VLAN hopping, ARP poisoning), physical security, NAC, port security, ACLs, firewalls (stateful vs stateless), IDS/IPS, VPN types (IPsec, SSL/TLS, L2TP).

Network Troubleshooting

20%

Systematic troubleshooting methodology, using tools (ping, traceroute, nslookup, netstat, ipconfig/ifconfig, Wireshark, cable tester), diagnosing connectivity, performance, and wireless issues.

Note the domain with the highest weight — many candidates under-invest here because it feels conceptual. In practice, this is where the exam is most precise, with scenario-based questions that test specifics.

What the exam actually tests

This is not a memorization exam. Questions require applied judgment under constraints. Almost every question includes a scenario with explicit requirements and asks you to select the most appropriate solution.

Here are examples of the question types you will encounter:

Protocol selection scenarios

"A network administrator needs to monitor bandwidth utilization on all WAN interfaces and receive alerts when utilization exceeds 80%. Which protocol should be configured?"

Tests matching protocols to requirements: SNMP for monitoring/alerting, NetFlow for traffic analysis, syslog for log collection. Know what each protocol does and what it cannot do.

Troubleshooting methodology

"A user cannot access internal resources but can access the internet. The default gateway is reachable. What should the technician check next?"

Requires applying the CompTIA troubleshooting model (identify → establish theory → test → plan → implement → verify → document). Network+ loves "what should you do next" sequence questions.

Subnetting and addressing

"A network is using the 172.16.0.0/22 address space. How many usable host addresses are available?"

/22 = 1022 usable hosts (2^10 - 2). Subnetting is tested on every Network+ exam. Practice calculating network address, broadcast, first/last host, and number of hosts for any CIDR prefix.

How to prepare — 4-week study plan

This plan assumes one hour per weekday and roughly 30 minutes of lighter review on weekends. It is calibrated for someone with some relevant experience. If you are starting from zero, add an extra week before Week 1 to familiarise yourself with the basics.

Week 1: Networking concepts + Subnetting

OSI model: memorize all 7 layers, PDUs, and what happens at each layer (encapsulation order)
TCP/IP model: application, transport, internet, network access — map to OSI
IPv4 subnetting: drill until you can subnet any Class A/B/C in under 60 seconds
Port numbers: memorize the 20 most common (20/21 FTP, 22 SSH, 25 SMTP, 53 DNS, 80/443 HTTP/S, 110/143 POP3/IMAP, 3389 RDP, etc.)

Week 2: Network implementation + Wireless

VLANs: purpose, 802.1Q tagging, native VLAN, inter-VLAN routing methods
STP: root bridge election, port states (blocking/listening/learning/forwarding), RSTP improvements
Wireless: 802.11 standards (a/b/g/n/ac/ax), channels (2.4 GHz vs 5 GHz), WPA2 vs WPA3
Cable types: Cat5e vs Cat6 vs Cat6a, single-mode vs multimode fiber, TIA-568A/B wiring

Week 3: Security + Troubleshooting tools

VPN types: IPsec (transport vs tunnel mode, IKEv1 vs v2), SSL VPN, L2TP/IPsec
Firewall types: packet filter, stateful, NGFW — know what each inspects and what it cannot
Troubleshooting tools: ping, traceroute, nslookup, dig, arp, netstat, ipconfig, Wireshark basics
20 troubleshooting practice questions daily — this is the largest weighted domain

Week 4: Mock exams + Performance-based questions

Full 90-question timed mock exam — target 75%+
Performance-based questions (PBQs): practice drag-and-drop and simulation tasks separately
Second mock exam — note which domains you score lowest on
Final review: OSI layers, subnetting, wireless security (WPA2/WPA3, CCMP/GCMP), and VPN types

Common mistakes candidates make

These patterns appear repeatedly among candidates who resit this exam. Knowing them in advance is worth several percentage points.

Not drilling subnetting enough

Subnetting appears in multiple questions on every Network+ exam, including performance-based questions. Candidates who can calculate subnets but do so slowly run out of time. Practice until subnetting is automatic — use flashcards, subnet calculators to check your work, and timed drills.

Memorizing port numbers without understanding protocols

Network+ does not just ask "what port is SSH?" It asks "a technician needs to allow SSH and block FTP while permitting SFTP — which ports should be opened?" Understand what each protocol does and when to use secure vs insecure alternatives.

Skipping performance-based questions during practice

PBQs (drag-and-drop, simulations) appear at the start of the exam and are worth significant marks. Candidates who only practice multiple-choice questions are not prepared for these task types. Practice PBQs specifically.

Underestimating the troubleshooting domain

Troubleshooting is 20% and requires applying the CompTIA methodology step-by-step. Questions test whether you follow the right sequence (hypothesize before testing, test before implementing). Answering based on intuition rather than the methodology gets many questions wrong.

Is Certsqill right for you?

Honestly: Certsqill is built for candidates who have already done some studying and want to convert knowledge into exam performance. If you have never touched the subject, start with a foundational course first — then come to Certsqill when you are ready to practice.

Where Certsqill is strong: question depth, AI-powered explanations, and domain analytics. Every question is mapped to the exam blueprint. When you get something wrong, the AI tutor explains why the right answer is right and why each wrong answer fails under the specific constraints in the question.

Where Certsqill is not a replacement: video courses and hands-on labs. Use Certsqill to test and sharpen — not as your first exposure to a topic you have never encountered.

Ready to start practicing?

820 N10-009 questions. AI tutor. 5 mock exams. 7-day free trial.