CompTIA certification practice
Practise CompTIA Network+ N10-009 practice test — original exam-style scenarios covering every exam domain, with detailed explanations, wrong-answer analysis, and common exam traps. CompTIA exams reward broad practical understanding. Courseiva helps you practise IT support, networking, security and troubleshooting concepts with realistic questions and clear answer explanations.
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Recommended: 10-question diagnostic
Covers all 5 domains · takes ~5 min · no account needed · shows your weak areas immediately
Key facts for the CompTIA Network+ N10-009 exam.
Exam cost
$369 USD / ~£300
Duration
90 minutes
Question count
Maximum 90 questions
Passing score
720 / 900
Validity
3 years
Delivered by
Pearson VUE
Online proctored
Yes — available
Retake policy
100% free — no account required
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Courseiva provides free CompTIA Network+ N10-009 (N10-009) practice questions with original exam-style questions, detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics. Courseiva is an independent platform and is not affiliated with CompTIA.
No wait after first attempt; 14 days after second failure
Question formats
CompTIA Network+ (N10-009) validates networking skills across infrastructure, networking concepts, network operations, security, and troubleshooting. It is vendor-neutral — covering concepts applicable to any manufacturer's equipment. Network+ is DoD 8570 / 8140 approved and widely accepted in both enterprise and government IT.
Official prerequisite
None
Recommended experience
CompTIA A+ and 9–12 months of networking experience
A+ level knowledge or 9–12 months in an IT role. Should understand TCP/IP, basic switching, and subnetting.
Should you skip this exam?
If you are targeting enterprise Cisco networking roles, CCNA is the stronger credential. Take Network+ if you want vendor-neutral coverage, a faster time-to-cert, or DoD 8570 compliance.
Courseiva study tip
The subnetting and troubleshooting questions are the hardest. Be able to subnet IPv4 and IPv6 without a calculator, and know the OSI model's relevance to real troubleshooting scenarios.
UK salary range
£28,000–£45,000
US salary range
$45,000–$70,000
Job roles that cite N10-009
What certification to take next
$369 USD.
720 out of 900.
For networking careers, CCNA is more respected — especially in environments that run Cisco equipment. Network+ is faster, cheaper, and vendor-neutral. Take Network+ for a quick first credential or for DoD 8570 compliance. Take CCNA if networking is your long-term career focus.
Yes — 3 years. Renew through CompTIA CE or by passing a higher-level cert.
Yes. Network+ is approved for IAT Level II under DoD 8570 / 8140, making it required for many US government and defence contractor IT roles.
Network+ is moderately easy for candidates who have completed A+ or have equivalent IT experience. The subnetting and troubleshooting questions are the hardest parts. Most candidates need 80–150 hours of study.
See how N10-009 stacks up against related certifications.
Practice modes
Choose a mode that matches your current study phase. Use topic practice early on and mock exams closer to your exam date.
All N10-009 Questions
Browse the full question bank organised by domain and difficulty.
Practice Test
Start a session with detailed answer explanations after each question.
Mock Exam
Simulate the real exam with a timed, full-length question set.
Quick 10
A 10-question warm-up — ideal for a short daily study session.
Flashcards
Reinforce key terms, commands, and protocol facts with flashcards.
Domain Practice
Focus exclusively on one exam domain to target your weakest area.
50-Question Set
Mid-length practice set covering all domains.
Full-length Simulation
Full exam simulation matching the real question count.
Exam guide
Start with a short practice session, review each missed answer, then return to the topics that caused mistakes.
CompTIA Network+ N10-009 questions test whether you can apply the concept in context, not just recognise a definition.
How the topic appears in realistic exam-style scenarios.
Which detail in the question changes the correct answer.
How to eliminate plausible but wrong options.
How to connect the question back to the wider exam objective.
Related practice questions
Use these internal links to move from the exam guide into focused topic practice pages.
Practise N10-009 questions linked to Networking Concepts.
Practise N10-009 questions linked to Network Implementation.
Practise N10-009 questions linked to Network Operations.
Practise N10-009 questions linked to Network Security.
Practise N10-009 questions linked to Network Troubleshooting.
Practise N10-009 questions linked to Network+ network fundamentals.
Practice directory
Every practice set is a unique selection of questions — numbered tests, domain-focused sessions, and topic-specific quizzes.
Showing 30 of 38 tests. See all 38 N10-009 practice tests →
Timed mode
Official blueprint
Target weak areas by practising questions from a single domain. Each domain page shows all questions, difficulty breakdown, and a focused practice session.
Practise N10-009 questions in this domain →
Practise N10-009 questions in this domain →
Practise N10-009 questions in this domain →
Practise N10-009 questions in this domain →
Practise N10-009 questions in this domain →
Browser-based calculators and references used when studying for N10-009.
Subnet Calculator
IP + CIDR or subnet mask → network, broadcast, hosts, wildcard
IP Binary Converter
Dotted decimal ↔ binary — with bit-by-bit breakdown
CIDR Reference Table
Every CIDR prefix from /1 to /32 — mask, wildcard, host count
VLSM Calculator
Base network + host requirements → efficiently allocated VLSM subnets
TCP/UDP Port Reference
Search 90+ well-known ports by name, number, or protocol — with exam context
OSI Model Reference
Click any layer → PDU, protocols, devices, and exam tips
Number Base Converter
Binary ↔ Decimal ↔ Hex ↔ Octal — with bit breakdown
IPv6 Address Tool
Expand, compress, and identify any IPv6 address type
Term reference
These terms appear frequently in N10-009 questions. Understanding them precisely reduces guessing and improves scores.
Dynamic route
A route that is automatically learned and updated by a router using a routing protocol, rather than being manually configured.
Security pillar
The Security pillar is a set of best practices for designing and operating cloud systems that protect data, systems, and assets through confidentiality, integrity, and availability controls.
File Transfer Protocol
File Transfer Protocol (FTP) is a standard network protocol used to transfer files between a client and a server over a TCP/IP network.
Public IP address
A globally unique IP address assigned to a device that allows it to communicate directly over the internet.
Persistent Disk
Persistent Disk is a durable, high-performance block storage service for Google Cloud virtual machines that retains data even after the VM is shut down or deleted.
Extensible Authentication Protocol
Extensible Authentication Protocol (EAP) is a flexible authentication framework used in network access control, particularly in wireless and point-to-point connections, that supports multiple authentication methods without requiring changes to the underlying protocol.
Proxy server
A proxy server is an intermediary device or software that sits between your computer and the internet, forwarding requests and responses while providing security, privacy, and caching.
Duplex mismatch
A duplex mismatch occurs when two connected network devices are configured with different duplex settings (one half-duplex, one full-duplex), leading to poor performance and data errors.
Free study guide
The Courseiva N10-009 study guide covers exam format, the official domain blueprint with weights, a structured study plan, and domain-specific tips for each section. Use it alongside practice questions to build both conceptual depth and exam confidence.
Sample questions
Select your answer before revealing the explanation. These questions are original exam-style — not copied from any exam or dump site.
Trap 1: Data Link layer
The Data Link layer (Layer 2) is responsible for physical addressing (MAC) and framing.
Trap 2: Transport layer
The Transport layer (Layer 4) ensures reliable end-to-end communication and segmentation.
Trap 3: Application layer
The Application layer (Layer 7) provides network services to user applications.
Data Link layer
Why wrong: The Data Link layer (Layer 2) is responsible for physical addressing (MAC) and framing.
Network layer
The Network layer provides logical addressing and routing functions, enabling communication across different networks.
Transport layer
Why wrong: The Transport layer (Layer 4) ensures reliable end-to-end communication and segmentation.
Application layer
Why wrong: The Application layer (Layer 7) provides network services to user applications.
Trap 1: The DHCP server is not reachable from the router
The scenario states that users can ping the DHCP server from the router, so the server is reachable.
Trap 2: The router's ip helper-address is configured incorrectly
Ping success indicates the router can reach the server, so the helper address is likely correct. The issue is on the server side.
Trap 3: The switch ports are not configured for VLAN 10
If ports were in the wrong VLAN, clients would likely not even obtain APIPA addresses or communicate with the router at all.
The DHCP server is not reachable from the router
Why wrong: The scenario states that users can ping the DHCP server from the router, so the server is reachable.
The DHCP server scope does not include the VLAN 10 subnet
Even if the DHCP server receives the request, it will not offer an IP address if it has no scope configured for the subnet of the requesting client (VLAN 10).
The router's ip helper-address is configured incorrectly
Why wrong: Ping success indicates the router can reach the server, so the helper address is likely correct. The issue is on the server side.
The switch ports are not configured for VLAN 10
Why wrong: If ports were in the wrong VLAN, clients would likely not even obtain APIPA addresses or communicate with the router at all.
Trap 1: Makes forwarding decisions based on IP addresses
IP address forwarding is a Layer 3 function performed by routers and Layer 3 switches.
Trap 2: Can route traffic between different VLANs without a router
Routing between VLANs requires Layer 3 functionality. A pure Layer 2 switch cannot perform inter-VLAN routing.
Trap 3: Provides Network Address Translation (NAT)
NAT is a Layer 3 function typically performed by routers or firewalls.
Makes forwarding decisions based on IP addresses
Why wrong: IP address forwarding is a Layer 3 function performed by routers and Layer 3 switches.
Uses MAC addresses to make forwarding decisions
Layer 2 switches use MAC address tables to forward frames to the correct port based on the destination MAC address.
Can route traffic between different VLANs without a router
Why wrong: Routing between VLANs requires Layer 3 functionality. A pure Layer 2 switch cannot perform inter-VLAN routing.
Provides Network Address Translation (NAT)
Why wrong: NAT is a Layer 3 function typically performed by routers or firewalls.
Trap 1: Hub
A hub operates at Layer 1 (physical layer) and blindly repeats signals to all ports.
Trap 2: Router
A router operates at Layer 3 (network layer) and forwards packets based on IP addresses.
Trap 3: Firewall
A firewall can operate at multiple layers, but its primary function is security filtering, not MAC-based forwarding.
Hub
Why wrong: A hub operates at Layer 1 (physical layer) and blindly repeats signals to all ports.
Switch
A switch forwards frames based on MAC addresses, operating at the data link layer.
Router
Why wrong: A router operates at Layer 3 (network layer) and forwards packets based on IP addresses.
Firewall
Why wrong: A firewall can operate at multiple layers, but its primary function is security filtering, not MAC-based forwarding.
Trap 1: A) UDP uses sequence numbers for ordering
UDP does not use sequence numbers; TCP does to ensure ordered delivery.
Trap 2: B) UDP provides reliable data delivery
UDP is unreliable; it does not guarantee delivery. TCP provides reliability through acknowledgments and retransmissions.
Trap 3: D) UDP requires a three-way handshake to establish a connection
UDP is connectionless and does not use a handshake. TCP uses a three-way handshake (SYN, SYN-ACK, ACK) to establish a connection.
A) UDP uses sequence numbers for ordering
Why wrong: UDP does not use sequence numbers; TCP does to ensure ordered delivery.
B) UDP provides reliable data delivery
Why wrong: UDP is unreliable; it does not guarantee delivery. TCP provides reliability through acknowledgments and retransmissions.
C) UDP has lower overhead due to minimal header
Correct. UDP has a smaller header (8 bytes) compared to TCP (20 bytes) and no connection setup, resulting in lower overhead.
D) UDP requires a three-way handshake to establish a connection
Why wrong: UDP is connectionless and does not use a handshake. TCP uses a three-way handshake (SYN, SYN-ACK, ACK) to establish a connection.
Trap 1: 2001:db8::1
2001:db8::/32 is reserved for documentation and is a global unicast address.
Trap 2: ff02::1
ff02::1 is the all-nodes multicast address, not a link-local unicast address.
Trap 3: 10.0.0.1
10.0.0.1 is an IPv4 address; it is not a valid IPv6 address.
fe80::1
fe80::/10 is the prefix for link-local addresses; fe80::1 is a common link-local address.
2001:db8::1
Why wrong: 2001:db8::/32 is reserved for documentation and is a global unicast address.
ff02::1
Why wrong: ff02::1 is the all-nodes multicast address, not a link-local unicast address.
10.0.0.1
Why wrong: 10.0.0.1 is an IPv4 address; it is not a valid IPv6 address.
Official booking and top-rated study resources for the N10-009.
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