Domain 1, Network Fundamentals, is a 20 percent block of the CCNA 200-301 exam and the foundation the other five domains build on, so it is where most candidates either build momentum or lose easy points. This practice test pulls questions from across the whole domain so you can find the weak spots before exam day finds them for you.
The questions below are the same validated items used in the per-topic quizzes across this series. The bank is weighted toward the heaviest clusters of sub-topics, so addressing and subnetting carry the most questions here, with the models, switching, physical layer, and virtualization topics filling out the rest. Every answer has a written explanation, and the test draws a fresh mix each time you retake it.
The question bank is current as of June 2026 and tracks the live CCNA 200-301 (v1.1) exam topics.
How to use this practice test
Work through every question, then read the explanation on each one, especially the ones you got right by guessing. The goal is not the score on a single run; it is to turn every explanation you did not already know into a topic you go back and study. When a question exposes a gap, follow the matching guide in the topic list below, then retake the test for a new set of questions.
Treat anything below about 85 percent as a signal to review that topic before you sit the real exam. Subnetting questions in particular reward speed, so if those slow you down, drill them until the math is automatic.
Take the Domain 1 practice test
Thirty questions, drawn at random from the full Domain 1 bank and re-sampled on every retake:
Once you can clear this consistently, you have a solid grip on Network Fundamentals. Use the topic list below to shore up anything that tripped you, then move on to the other domains.
What Domain 1 covers
Every sub-topic in this practice test has a full hands-on guide. Work through any that the test exposed as weak:
Addressing and subnetting carry the most weight. Start with IPv4 addressing and IPv6 addressing, then drill the math with subnetting by host requirements and VLSM.
The models and transport: the OSI and TCP/IP models frame everything else, and TCP versus UDP covers how data actually moves.
Switching and devices: see how switches build the MAC address table, the roles of routers, switches, and firewalls, and the network architectures they form.
The physical layer: copper versus fiber cabling, Power over Ethernet, and wireless fundamentals.
Hosts, virtualization, and the CLI: verifying IP settings on Windows, macOS, and Linux, virtualization with VMs, containers, and VRFs, reading interface status and counters, and the IOS CLI navigation shortcuts.
Where to go after Domain 1
Network Fundamentals is the foundation the other five domains build on, so it is worth getting solid here first. When you can pass this test comfortably, the CCNA 200-301 study roadmap lays out the full path through Network Access, IP Connectivity, IP Services, Security Fundamentals, and Automation, with the same mix of hands-on guides, real Cisco output, and practice questions for each.
