How long does it take to prepare for the Cisco Certified DevNet Associate?

The exam itself is 120 minutes, which tells you how much is at stake in one sitting. Preparation time is usually measured in weeks rather than days for a associate exam of this size, and this one scores 2/10 for difficulty in our bank.

Which Cisco Certified DevNet Associate domain should I study first?

Security Fundamentals, at 20% of the exam. It carries the most weight, so it is where your preparation effort returns the most points.

Should I do practice questions or read a book?

Do practice questions first for any domain you are weak in, and read for the ones you understand but cannot apply. Reading everything twice is the most common way to fail: it feels like progress and it is not. Certilum has 100 questions for this exam, scored per domain against the official weights.

What score should I have on a mock before booking the exam?

At least 93% on a timed mock in the real format. The 83% cut score leaves very little margin.

What is the single best way to find my weak domain?

Take one full mock, then look at the per-domain breakdown rather than the total. The total tells you whether you passed; the breakdown tells you which domain to study next, and that is the only actionable number in the result.

Study plan

How to Pass the Cisco Certified DevNet Associate Exam

200-901

A study plan for the Cisco Certified DevNet Associate certification exam, built from the official domain weights instead of a generic template. Focus on hands-on labs using Cisco Packet Tracer, GNS3, or physical gear for traditional topics. For automation, use DevNet Sandboxes and Postman to practice REST API calls. Write short Python scripts leveraging the requests library. Allocate 60% of study time to automation and programmability domains since they carry the most weight and are less familiar to traditional network engineers. Review JSON and YAML data formats thoroughly.

6 domains

100 questions

120 min

83% to pass

certilum

Study in weight order, not topic order

The plan below follows the official blueprint weights, so the order of study is the order that returns the most points.

1
Security Fundamentals
20%
- Compare security concepts (threat, vulnerability, exploit)
- Configure and verify device access control using AAA (TACACS+, RADIUS)
- Explain public key cryptography and digital certificates
- Describe security program elements (user awareness, physical security)
- +1 more topics in the blueprint
20 practice questions tagged to this domain.
2
Automation and Programmability
20%
- Explain how automation impacts network management
- Compare traditional vs. controller-based networking
- Describe characteristics of REST-based APIs (CRUD, HTTP verbs, data encoding)
- Interpret Python scripts for basic network automation tasks
- +2 more topics in the blueprint
20 practice questions tagged to this domain.
3
Network Fundamentals (Expanded)
20%
- Explain the OSI and TCP/IP models (comparison and layers)
- Configure and verify IPv4 addressing and subnetting
- Describe IPv6 addressing basics (EU-64, global unicast
- Compare Ethernet switching concepts (MAC learning, forwarding
- +2 more topics in the blueprint
20 practice questions tagged to this domain.
4
IP Services
15%
- Configure and verify NTP
- Explain SNMP (versions, MIB, traps)
- Configure and verify syslog
- Describe QoS (classification, marking, queuing)
- +1 more topics in the blueprint
15 practice questions tagged to this domain.
5
IP Connectivity and Services
15%
- Configure and verify inter-VLAN routing (Router on a Stick, SVI)
- Describe DNS lookup and Dynamic Host Configuration Protocol (DHCP)
- Configure and verify Network Address Translation (NAT)
- Troubleshoot IP connectivity issues using traceroute and ICMP
15 practice questions tagged to this domain.
6
Network Access
10%
- Configure and verify VLANs and trunking (802.1Q)
- Explain Spanning Tree Protocol (STP) basics
- Configure and verify EtherChannel (LACP)
- Describe port security operations
10 practice questions tagged to this domain.

Three phases, in order

Most failures are process failures, not knowledge failures.

Step 1

Phase 1 — Learn the high-weight domains

Start where the points are. The first domains on this plan carry the most weight, so a gap there costs the most. Cover the objectives, then close each topic with practice questions you actually get wrong.

Step 2

Phase 2 — Close the mid-weight domains

The middle of the blueprint is where most candidates plateau. These domains are worth less per topic than the first phase, but they add up fast, and they are the usual difference between a near miss and a clear pass.

Step 3

Phase 3 — Timed full mocks

Stop reading new material at this point. Run full-length exams under the real time limit and the real format, and use the per-domain breakdown to find which domain is still costing you the pass.

Where we put the emphasis

For CCNA Automation, Certilum ensures you understand the business value of automation via scenario‑based practice questions – automating VLAN deployments via API, validating network changes, and building simple Python‑based dashboards. Our quizzes bridge certification and real‑world automation engineering.

The order matters less than the loop. Every domain you finish should end with questions you got wrong, because the mistake is the only thing you actually needed to study. On the Cisco Certified DevNet Associate that loop is worth 15% of the exam in the first block alone.

More about the Cisco Certified DevNet Associate exam

Explore the rest of this page series: format, cost, difficulty, requirements and how to prepare.

Exam formatQuestions, time and scoring Exam costPrice, retakes and total budget Pass rateThe score you need Who can take itRequirements and prerequisites

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Frequently asked questions

Everything you need to know about the Cisco Certified DevNet Associate exam.

Focus on hands-on labs using Cisco Packet Tracer, GNS3, or physical gear for traditional topics. For automation, use DevNet Sandboxes and Postman to practice REST API calls. Write short Python scripts leveraging the requests library. Allocate 60% of study time to automation and programmability domains since they carry the most weight and are less familiar to traditional network engineers. Review JSON and YAML data formats thoroughly.

How to Pass the Cisco Certified DevNet Associate Exam

Study in weight order, not topic order

Security Fundamentals

Automation and Programmability

Network Fundamentals (Expanded)

IP Services

IP Connectivity and Services

Network Access