Prepare for Network+ N10-009 with 350+ free practice questions, detailed explanations, and realistic exam simulations covering OSI, TCP/IP, subnetting, SD-WAN, SASE, zero trust, and more.
⚡ Quick Facts
Quick Answer: CompTIA Network+ (N10-009) costs $369 USD, has up to 90 questions, 90-minute duration, and a passing score of 720/900 (~80%). Vendor-neutral and DoD 8570 approved for IAT Level II. ExamCert offers 350+ free practice questions for 2026.
Try these 5 sample questions from our 350+ question bank. Each includes detailed explanations.
Which OSI layer is responsible for end-to-end delivery of segments and uses port numbers to identify services?
The Transport layer (Layer 4) handles end-to-end delivery using TCP (reliable, connection-oriented) and UDP (connectionless). Port numbers like 80, 443, 22 live at this layer to multiplex traffic to the right application.
A network admin needs to subnet 192.168.10.0/24 into four equal subnets. What subnet mask should be used?
/26 borrows 2 bits (2² = 4 subnets), giving 64 addresses each (62 usable). The four subnets are .0/26, .64/26, .128/26, .192/26. Subnetting is the most-tested skill on Network+ - drill until it's automatic.
Which security model assumes no implicit trust based on network location and verifies every request, even from inside the corporate network?
Zero Trust treats every connection as untrusted regardless of source - inside or outside the network perimeter. Every request is authenticated, authorized, and encrypted. N10-009 added zero trust to the syllabus, so expect 1-2 questions on it.
A user can ping by IP address but not by hostname. Which service is MOST likely misconfigured?
DNS resolves hostnames to IP addresses. If IP-based pings work but hostname pings fail, the network is fine - DNS is the broken piece. Use nslookup or dig to confirm and check the client's configured DNS server.
Which WAN technology uses a centralized control plane and software-defined policies to dynamically route traffic over multiple links (MPLS, broadband, LTE)?
SD-WAN (Software-Defined WAN) decouples the control plane from the data plane and uses policy to steer traffic across multiple transports. It is a major addition to N10-009 - expect questions on SD-WAN, SASE (Secure Access Service Edge), and overlay vs underlay.
Yes. ExamCert offers a free tier with hundreds of N10-009 practice questions and detailed explanations. Premium ($4.99 lifetime) unlocks all 350+ questions and advanced features.
350+ practice questions covering all five N10-009 domains - networking concepts, implementation, operations, security, and troubleshooting. Updated weekly.
Yes - all questions align with the current CompTIA Network+ N10-009 objectives, including modern topics like SD-WAN, SASE, zero trust, and IPv6.
Free includes hundreds of questions, basic explanations, and progress tracking. Premium ($4.99 one-time) unlocks all 350+ questions, detailed explanations with references, exam simulation mode, performance analytics, and 100% money-back guarantee.
Many users have. We strongly recommend pairing ExamCert with subnetting drills (SubnettingPractice.com) and Professor Messer's free N10-009 video series for full coverage.
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