The CCNA (Cisco Certified Network Associate) is one of the most recognised entry-level networking certifications in the world. It's also one of the most underestimated — candidates regularly go in thinking it's a memorisation test and come out having failed scenario questions they didn't prepare for.
If you're preparing for the Cisco 200-301 in 2026, here's what you actually need to know.
What the CCNA 200-301 tests
The exam covers six domains:
| Domain | Exam weight |
|---|---|
| Network Fundamentals | 20% |
| Network Access | 20% |
| IP Connectivity | 25% |
| IP Services | 10% |
| Security Fundamentals | 15% |
| Automation & Programmability | 10% |
IP Connectivity is the largest single domain and the one most candidates underperform on. It covers routing protocols, routing table behaviour, and static routes — topics that sound simple until you're reading a network diagram under time pressure and need to trace exactly how a packet gets from A to B.
The exam is 120 minutes, 100–120 questions, and includes drag-and-drop, multiple choice, and lab simulations where you configure actual IOS devices.
The three hardest areas on CCNA
1. Subnetting
Subnetting is tested heavily and time pressure makes it brutal. You need to be able to calculate subnet masks, host ranges, broadcast addresses, and number of usable hosts — quickly, without a calculator.
The good news: subnetting is a pure skill. It gets fast with practice. The candidates who struggle are those who understand the concept but haven't drilled it enough to do it under exam conditions in under 60 seconds.
Target: be able to subnet any /8 to /30 network in under 90 seconds before exam day.
2. Spanning Tree Protocol (STP)
STP is one of the most commonly failed topics on CCNA. It's conceptually dense — root bridge election, port roles (root, designated, blocked), port states, and how topology changes propagate.
The exam loves questions that give you a partial network diagram and ask which port will be blocked, or what happens to the topology when a specific link goes down. Getting these right requires understanding the full STP decision process, not just what the acronym stands for.
3. OSPF and routing protocol behaviour
OSPF appears in the IP Connectivity domain — the heaviest weighted domain. The exam tests neighbour relationships, DR/BDR election, cost calculation, and how routes are selected when multiple paths exist.
Common mistakes: not knowing that OSPF uses cost (based on bandwidth) not hop count, misunderstanding what causes two routers to not form a neighbour relationship, and confusing OSPF areas.
How to structure your study
Weeks 1–3: Foundations Work through a structured course — Jeremy's IT Lab on YouTube (free) or Cisco's official NetAcad material. Don't skip the labs. Use Cisco Packet Tracer (free) to build and configure the topologies as you learn them. Passive watching does not prepare you for simulation questions.
Weeks 4–6: Subnetting and routing deep dive Dedicate specific time to subnetting practice daily — even 15 minutes. Use subnetting drill tools to get your speed up. Simultaneously go deep on OSPF and STP, the two most commonly failed topics. Build lab scenarios that break and fix these protocols.
Weeks 7–8: Practice questions by domain Don't jump straight to full practice exams. Work by domain first. Find out whether your gap is in Network Access, IP Services, or Security Fundamentals — not just your overall percentage. Full tests hide where your real problems are.
Week 9: Timed full exams Simulate real exam conditions. 120 minutes, no pauses, no looking things up. The time pressure on CCNA is real — simulation questions take significantly longer than multiple choice and eat into your buffer.
The most common reason people fail CCNA
They treat it as a knowledge test instead of an application test.
Cisco's questions don't ask "what is OSPF?" They show you a network diagram, tell you a specific link is down, and ask which routes will be removed from the routing table and why. Or they give you a switch output and ask which port is the root port and what the port cost is.
That requires being able to read IOS output, interpret topology diagrams, and apply protocol rules — not recall definitions. The candidates who pass consistently are those who have seen enough varied scenarios that nothing on the exam is surprising.
Key resources
- Jeremy's IT Lab (YouTube + Anki cards) — free, comprehensive, widely considered the best free CCNA resource
- Cisco Packet Tracer — free network simulator, essential for lab practice
- Cisco NetAcad — official learning path, free with registration
- ExamCoach — adaptive CCNA practice questions by topic, tracks your weak areas across sessions so you know exactly where to focus
Stop studying what you already know
The biggest time waste in CCNA prep is reviewing topics you've already mastered because your course covers them in sequence. If your subnetting is solid but your STP is shaky, another hour on subnetting does nothing for your score.
ExamCoach tracks your performance topic by topic across every session. After a few Daily Quizzes, you'll see exactly which CCNA domains are pulling your score down — and you can focus your remaining study time where it actually counts.
ExamCoach covers CCNA, AWS CLF-C02, AZ-104, CompTIA Security+, CISSP, CFA Level 1, and more.