NETWORK+ N10-009

CompTIA Network+
Practice Tests

6 full mock exams + special modes.
Scaled scoring 100–900. Passing: 720. Covers networking concepts, implementation, operations, security, and troubleshooting.

Full Mock Exams 90 questions · 90 min · Scaled 100–900

Mock 1 Full Exam
90 Questions 90 min 720/900
Foundation exam — covers OSI model, TCP/IP, subnetting, routing, and switching. Ideal for your first full N10-009 simulation.
Start Mock 1
Mock 2 Full Exam
90 Questions 90 min 720/900
Infrastructure focus — emphasises VLANs, wireless standards, WAN technologies, and cabling. Benchmarks your implementation knowledge.
Start Mock 2
Mock 3 Full Exam
90 Questions 90 min 720/900
Operations & security deep dive — monitors, SNMP, disaster recovery, firewalls, and VPNs. Targets the two highest-weighted domains.
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Mock 4 Full Exam
90 Questions 90 min 720/900
Troubleshooting emphasis — network connectivity, performance, DNS/DHCP faults, and tool selection. Mirrors real-exam scenario weighting.
Start Mock 4
Mock 5 Full Exam
90 Questions 90 min 720/900
Mixed domains — scenario-based questions across all 5 objectives. Reflects the N10-009 exam distribution with harder multi-select items.
Start Mock 5
Mock 6 Full Exam
90 Questions 90 min 720/900
Final readiness exam — most challenging question set. Includes borderline scenarios designed to expose gaps before exam day.
Start Mock 6

Performance-Based Questions (PBQs)

Subnetting Lab PBQ
Calculate subnets, CIDR, network IDs, and assign departments with VLSM.
Open PBQ Labs
Topology Builder PBQ
Drag routers, switches, firewalls, and APs into correct network zones.
Open PBQ Labs

Special Practice Modes

Quick Drill 45 Questions
Rapid-fire across all domains. Great for a quick review session.
Quick Drill (45Q)
Speed Challenge Timed
Full 90-question exam with only 60 minutes. Forces faster decision-making.
Speed Challenge

Network+ N10-009 Exam Strategy & Study Tips

OSI Model — Foundation of Every Question

The OSI model underpins the entire exam. Know all 7 layers (Physical through Application), what operates at each layer (hubs at L1, switches at L2, routers at L3), and the encapsulation/de-encapsulation process. Questions often ask "At which OSI layer does X operate?" — use our OSI matching PBQ to drill this until it's automatic.

Subnetting — You Must Know VLSM

Subnetting is tested on every Network+ exam. Master calculating network IDs, broadcast addresses, and usable IP ranges for CIDR blocks /24 through /30. Know the block sizes (magic numbers): /25=128, /26=64, /27=32, /28=16, /29=8, /30=4. Use our interactive subnetting lab to practice with real scenarios.

Troubleshooting (24%) — The Highest-Weight Domain

Follow the OSI model bottom-up when troubleshooting: check physical layer first (cables, link lights), then data link (VLANs, MAC addresses), then network (IP addressing, routing), then transport/application. The exam presents scenario-based issues like "users cannot access the internet" where you must identify the MOST LIKELY cause from multiple plausible options.

Real Exam Tips from Network Engineers

The N10-009 exam has the most PBQs of any CompTIA exam (3-7 per exam). Budget extra time for these — they appear at the start. Memorize common CLI commands: ipconfig /all, ping, tracert, nslookup, netstat -an, arp -a. Know the difference between T568A and T568B wiring standards. Wireless site survey and WPA3-Enterprise configuration are frequent PBQ topics.

Sample CompTIA Network+ N10-009 questions with explanations

Use these examples to check how the topics are tested. Read the explanation for every option you were unsure about, then start a scored practice set above.

Question 1 1.0 Networking Concepts

Which CIDR is 255.255.255.0 with 254 hosts?

  • ✓ /24
  • ○ /29
  • ○ /30
  • ○ /8
Answer: A. /24
/24 = 255.255.255.0, 254 hosts.
Question 2 1.0 Networking Concepts / 3.0 Network Operations

Which network service centralized aaa for network access?

  • ○ NTP
  • ○ LDAP
  • ○ TACACS+
  • ✓ RADIUS
Answer: D. RADIUS
RADIUS: Centralized AAA for network access.
Question 3 2.0 Network Implementation

Which switch feature provides power over cable?

  • ✓ PoE
  • ○ EtherChannel
  • ○ STP
  • ○ VLAN
Answer: A. PoE
PoE is correct. This concept is important for the certification exam and appears in scenario-based questions testing your understanding of when and how to apply it.
Question 4 2.0 Network Implementation / 3.0 Network Operations

Which SDN/virtualization term is defined as: "Network Functions Virtualization, virtualizes network appliances"?

  • ✓ NFV
  • ○ SDN
  • ○ GRE
  • ○ VXLAN
Answer: A. NFV
NFV: Network Functions Virtualization, virtualizes network appliances.
Question 5 2.0 Network Implementation / 4.0 Network Security

Which segmentation method ip-based segmentation at layer 3?

  • ○ Microsegmentation
  • ○ DMZ
  • ○ VLAN
  • ✓ Subnetting
Answer: D. Subnetting
Subnetting: IP-based segmentation at Layer 3.

Open the full CompTIA Network+ N10-009 question-and-answer guide