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Check your readiness for the CompTIA Network+ N10-009 exam with 50 exam-style questions across all five domains, each with an instant explanation. Free to take, timed to the pace of the real exam, and retake it as often as you want.
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Enter your details, then choose a 25-question Quick Test or the full 50-question, 50-minute practice test.
This free CompTIA Network+ practice test checks your readiness for the N10-009 exam with 50 exam-style scenario questions across all five domains, each with an explanation for every answer choice. Built by Training Camp, an authorized CompTIA partner, and drawn from the same objectives we teach in our Network+ Boot Camp. New to the exam? Learn more about the Network+ certification.
N10-009 is organized into five weighted domains: Networking Concepts (23%), Network Implementation (20%), Network Operations (19%), Network Security (14%), and Network Troubleshooting (24%). The real exam has a maximum of 90 questions, a 90-minute time limit, and a passing score of 720 on a scale of 100 to 900. It mixes multiple-choice items with performance-based questions that ask you to configure or troubleshoot a simulated network.
CompTIA recommends CompTIA A+ and 9 to 12 months of hands-on networking experience before sitting the exam. This practice test pulls questions from every domain in roughly the same proportions as the live exam, so your domain breakdown at the end is a fair signal of where to spend your study time.
Take it once without notes to get an honest baseline. Read the explanation for every answer, including the ones you got right, because the incorrect-choice explanations are where the distinctions between similar technologies (OSPF versus BGP, RPO versus RTO, PoE versus PoE+) get spelled out. Then focus your study on the weakest domain and retake the test in a week. The 50-minute timer gives you one minute per question, the same pace as the real N10-009 exam, which allows 90 minutes for a maximum of 90 questions.
Domains Covered · N10-009
OSI model, addressing and subnetting, ports and protocols, appliances, topologies, cloud.
Routing, NAT, first-hop redundancy, VLANs, STP, PoE, wireless, and physical installs.
SNMP, syslog, and flow monitoring, DNS/DHCP/NTP services, VPNs, documentation, DR.
IAM, network access control, segmentation, ACLs, common attacks, and hardening.
Troubleshooting methodology plus cable, connectivity, and performance problems.
Four questions from the bank, one per domain, with the reasoning behind every answer. The full test has 50.
A network administrator is writing a firewall rule that permits inbound traffic only when the destination TCP port is 443. The rule does not inspect the payload or the URL, only the port number in the segment header. At which layer of the OSI model does this rule operate?
Correct. TCP and UDP port numbers are fields in the Transport layer header, so a rule that matches on destination port 443 without looking at the application data is operating at Layer 4.
An organization is moving its email to a hosted provider. The provider asks the network team to update the public DNS zone so that other mail servers on the internet know where to deliver messages for the company's domain. Which DNS record type must be created or changed?
Correct. A Mail Exchanger (MX) record specifies the hostnames, with priorities, that accept email for a domain. Sending mail servers query MX records to decide where to deliver.
Two access switches on different floors each have ports assigned to VLAN 10 (Sales) and VLAN 20 (Engineering). The switches are connected by a single fiber uplink. Neither Sales nor Engineering users on floor one can reach their counterparts on floor two, though users within the same switch communicate normally. What should the technician configure on the uplink ports?
Correct. An 802.1Q trunk tags each frame with its VLAN ID so multiple VLANs can share one physical link. Configuring the uplink as a trunk on both ends, allowing VLANs 10 and 20, extends each VLAN across the two switches.
Users on a VLAN report that web pages load slowly and some see certificate warnings. A packet capture shows repeated gratuitous ARP replies claiming that the default gateway's IP address maps to a MAC address that belongs to a workstation, not the router. Which attack is occurring, and which switch feature directly mitigates it?
Correct. Forged ARP replies that bind the gateway IP to an attacker's MAC address are ARP spoofing (ARP poisoning), placing the attacker on-path to intercept or alter traffic, which explains the slowness and certificate warnings. Dynamic ARP Inspection validates ARP packets against the DHCP snooping binding table and drops the forged ones.
Every one of the 50 questions works this way: an explanation for the right answer and for the one you picked, so a wrong answer teaches you something. Questions last reviewed against the current CompTIA Network+ (N10-009) objectives.
Quick answers about the test, the CompTIA Network+ (N10-009) exam, and how to prepare.
Yes. Training Camp's Network+ practice test is free to take, with exam-style questions across all five CompTIA Network+ N10-009 domains and a written explanation for every answer choice.
It is 50 multiple-choice scenario questions drawn from all five N10-009 domains, with an instant explanation after each answer and a 50-minute timer, which matches the one-minute-per-question pace of the real exam. You can retake it as often as you want. It is a readiness check, not a substitute for full preparation.
The CompTIA Network+ N10-009 exam has a maximum of 90 questions and a 90-minute time limit, including multiple-choice and performance-based questions.
You need a scaled score of 720 on a scale of 100 to 900 to pass the CompTIA Network+ N10-009 exam.
N10-009 covers five domains: Networking Concepts (23%), Network Implementation (20%), Network Operations (19%), Network Security (14%), and Network Troubleshooting (24%).
Network+ is an entry-level to intermediate certification. CompTIA recommends CompTIA A+ and 9 to 12 months of networking experience. The subnetting, troubleshooting, and performance-based questions are where most candidates lose points, so practice those areas hands-on.
Work through the N10-009 objectives, get hands-on time with switches, routers, and a subnet calculator, and use practice questions to find weak domains. For a structured path, our accelerated Network+ Boot Camp covers every objective with an exam voucher included.