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200+ Free CompTIA Network+ Practice Questions

Pass your CompTIA Network+ Certification (N10-009) exam on the first try — instant access, no signup required.

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Which OSI model layer is responsible for establishing, maintaining, and terminating sessions between applications?

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Key Facts: CompTIA Network+ Exam

720/900

Passing Score

CompTIA

Up to 90 Q

Exam Questions

CompTIA N10-009

June 20, 2024

Launch Date

CompTIA

24%

Troubleshooting Weight

CompTIA N10-009

$390

Exam Fee

CompTIA

3 years

Certification Valid

CompTIA (CE required)

CompTIA Network+ (N10-009) requires a passing score of 720 out of 900. The exam has up to 90 multiple-choice and performance-based questions in 90 minutes. The official domains are Networking Concepts (23%), Network Implementation (20%), Network Operations (19%), Network Security (14%), and Network Troubleshooting (24%).

Sample CompTIA Network+ Practice Questions

Try these sample questions to test your CompTIA Network+ exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1Which layer of the OSI model is responsible for logical addressing and routing packets between networks?
A.Data Link layer
B.Network layer
C.Transport layer
D.Session layer
Explanation: The Network layer (Layer 3) handles logical addressing (IP addresses) and determines the best path for data to travel between different networks. Routers operate at this layer to forward packets based on IP addresses. The Data Link layer handles physical addressing (MAC), while the Transport layer manages end-to-end communication.
2A network administrator needs to allow only HTTPS traffic into the network while blocking all other inbound connections. Which TCP port must be permitted?
A.Port 80
B.Port 443
C.Port 8080
D.Port 8443
Explanation: HTTPS (HTTP Secure) uses TCP port 443. Port 80 is for unencrypted HTTP traffic. Ports 8080 and 8443 are common alternative HTTP/HTTPS ports but are not the standard well-known ports. Allowing only port 443 ensures encrypted web traffic while blocking everything else.
3Which of the following IP addresses belongs to the 192.168.10.0/24 network?
A.192.168.11.1
B.192.168.9.254
C.192.168.10.200
D.192.168.100.1
Explanation: The /24 subnet mask (255.255.255.0) means only the first three octets define the network. All hosts in 192.168.10.0/24 must have the first three octets as 192.168.10. Only 192.168.10.200 matches. The other addresses (192.168.11.1, 192.168.9.254, 192.168.100.1) are on different /24 networks.
4A technician is configuring a server with an IPv6 address. The address FE80::1/64 is assigned. What type of IPv6 address is this?
A.Global unicast address
B.Link-local address
C.Multicast address
D.Loopback address
Explanation: IPv6 addresses starting with FE80::/10 (FE80 through FEBF) are link-local addresses. These are automatically configured on all IPv6-enabled interfaces and are only valid within a single network segment — they cannot be routed. Global unicast addresses begin with 2000::/3, multicast begins with FF00::/8, and the loopback address is ::1/128.
5Which protocol automatically assigns IP addresses, subnet masks, default gateways, and DNS server addresses to client devices?
A.ARP
B.DHCP
C.DNS
D.ICMP
Explanation: DHCP (Dynamic Host Configuration Protocol) automatically provides IP configuration to clients including IP address, subnet mask, default gateway, DNS servers, and lease time. ARP resolves IP addresses to MAC addresses. DNS resolves hostnames to IP addresses. ICMP is used for network diagnostics (ping, traceroute) and error reporting.
6A company is planning to migrate its on-premises servers to a cloud environment where each customer's workload runs on dedicated hardware that is not shared with other customers. Which cloud deployment model best describes this?
A.Public cloud
B.Community cloud
C.Private cloud
D.Hybrid cloud
Explanation: A private cloud provides dedicated infrastructure that is not shared with other organizations. Resources are provisioned exclusively for one organization, either on-premises or hosted by a third party. Public clouds share infrastructure among multiple tenants. A community cloud is shared among organizations with similar requirements. A hybrid cloud combines public and private cloud models.
7Which OSI model layer is responsible for establishing, maintaining, and terminating sessions between applications?
A.Transport layer
B.Presentation layer
C.Session layer
D.Application layer
Explanation: The Session layer (Layer 5) manages dialog control between applications, including establishing, maintaining, and gracefully terminating sessions. It handles synchronization and checkpointing. The Transport layer (Layer 4) provides reliable end-to-end data transfer. The Presentation layer (Layer 6) handles data formatting, encryption, and compression.
8A network engineer needs to subnet 192.168.1.0/24 into subnets with at least 30 usable host addresses each. Which subnet mask should be used?
A./25 (255.255.255.128)
B./26 (255.255.255.192)
C./27 (255.255.255.224)
D./28 (255.255.255.240)
Explanation: A /27 subnet has 2^5 = 32 total addresses, providing 32 - 2 = 30 usable host addresses (subtracting network and broadcast addresses). A /28 gives only 14 usable hosts, which is too few. A /26 provides 62 usable hosts, and /25 provides 126 usable hosts — both work but waste address space if exactly 30 are needed.
9Which protocol operates at the Application layer and is used to securely transfer files between a client and a server using an encrypted connection?
A.FTP
B.TFTP
C.SFTP
D.SCP only
Explanation: SFTP (SSH File Transfer Protocol) provides secure file transfer over an encrypted SSH connection on TCP port 22. Regular FTP (ports 20/21) transmits data in plaintext and is insecure. TFTP (port 69) uses UDP and has no authentication. While SCP also uses SSH, SFTP provides a more complete file management protocol with directory listings and file manipulation.
10A company's DNS server returns the IP address 192.0.2.1 when queried for www.example.com. An employee reports that the website is unreachable. Which DNS record type maps a hostname to an IPv4 address?
A.AAAA record
B.CNAME record
C.A record
D.MX record
Explanation: An A (Address) record maps a hostname to a 32-bit IPv4 address. AAAA records map hostnames to 128-bit IPv6 addresses. CNAME (Canonical Name) records create aliases pointing to another hostname. MX (Mail Exchange) records specify mail servers responsible for receiving email for a domain.

About the CompTIA Network+ Exam

The CompTIA Network+ (N10-009) certification validates the skills needed to deploy, operate, secure, and troubleshoot wired, wireless, cloud, and hybrid networks. N10-009 is the current V9 exam series launched June 20, 2024.

Questions

90 scored questions

Time Limit

90 minutes

Passing Score

720/900

Exam Fee

$390 (CompTIA / Pearson VUE)

CompTIA Network+ Exam Content Outline

23%

Networking Concepts

OSI and TCP/IP models, IP addressing (IPv4/IPv6), subnetting, CIDR, routing protocols (OSPF, BGP, EIGRP), switching concepts (VLANs, STP, trunking), cloud networking (IaaS, PaaS, SaaS), SD-WAN, SASE

20%

Network Implementation

Wired and wireless standards (802.11ax/Wi-Fi 6E), copper and fiber cabling, network hardware (routers, switches, firewalls, APs), VLAN configuration, static and dynamic routing, DNS, DHCP, NTP

19%

Network Operations

Network monitoring (SNMP, NetFlow, syslog), documentation and diagrams, change management, backup and recovery, high availability, disaster recovery, remote access (VPN, RDP, SSH)

14%

Network Security

Zero Trust architecture, SASE, network attacks (DDoS, VLAN hopping, ARP spoofing, on-path attacks), firewalls (stateful vs stateless), IDS/IPS, network segmentation, PKI and certificates, AAA (RADIUS, TACACS+), wireless security (WPA3)

24%

Network Troubleshooting

Systematic troubleshooting methodology, wired and wireless issues, IP connectivity problems, command-line tools (ping, traceroute, nslookup, netstat, arp, ipconfig/ifconfig, tcpdump, Wireshark), fiber and copper testing

How to Pass the CompTIA Network+ Exam

What You Need to Know

  • Passing score: 720/900
  • Exam length: 90 questions
  • Time limit: 90 minutes
  • Exam fee: $390

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

CompTIA Network+ Study Tips from Top Performers

1Master subnetting before exam day because Network+ can ask you to calculate subnet masks, CIDR ranges, and valid host addresses under time pressure
2Know the OSI model layers by heart (Physical, Data Link, Network, Transport, Session, Presentation, Application) and which protocols operate at each layer
3Study the Network Troubleshooting domain (24%) systematically, including the troubleshooting methodology and commands such as ping, traceroute, nslookup, netstat, and arp
4Understand Zero Trust and SASE concepts because they reflect modern N10-009 network security and access patterns
5Learn wireless standards: 802.11a/b/g/n/ac/ax frequencies, channels, and speeds; WPA3 vs WPA2 security; and common wireless interference issues
6Complete 200+ practice questions and score 80%+ consistently before scheduling, paying special attention to performance-based question types

Frequently Asked Questions

What is the CompTIA Network+ passing score?

The CompTIA Network+ (N10-009) exam requires a passing score of 720 out of 900. The exam has up to 90 questions, including multiple-choice and performance-based questions, with a 90-minute time limit. CompTIA uses scaled scoring, so the exact number of correct answers needed varies based on the difficulty of your specific question set.

How hard is the CompTIA Network+ exam?

Network+ is a broad foundational networking certification that is usually harder than A+ because it expects applied subnetting, routing, switching, wireless, security, operations, and troubleshooting judgment. CompTIA recommends A+ plus 9-12 months of hands-on networking experience, but it does not publish an official pass rate. Candidates should expect PBQs that require configuration and troubleshooting rather than definition recall alone.

What changed in the N10-009 update?

The N10-009 exam launched June 20, 2024 and updated the blueprint for modern wired, wireless, cloud, and hybrid networks. The current official domain weights are Networking Concepts 23%, Network Implementation 20%, Network Operations 19%, Network Security 14%, and Network Troubleshooting 24%.

How is Network+ different from CCNA?

Network+ is vendor-neutral and covers broad networking concepts across wired, wireless, cloud, security, operations, and troubleshooting environments. CCNA is Cisco-focused and goes deeper into Cisco configuration and command-line troubleshooting. Network+ is usually the better first networking certification for candidates who need platform-neutral fundamentals; CCNA is usually better for candidates targeting Cisco-heavy network roles.

What jobs can I get with CompTIA Network+?

Network+ supports roles such as technical support specialist, network support technician, junior network administrator, network operations specialist, and system administrator. CompTIA also maps Network+ to NICE and DoD 8140 work roles including technical support specialist, network operations specialist, and system administrator.