DevNet Associate study guide
DevNet Associate · Work through your exam, one topic at a time.
The Cisco Certified DevNet Associate - exam code 200-901, often shortened to DEVASC - is an associate-level credential aimed at people who work where software development meets network infrastructure. It suits junior developers building against network APIs, network engineers moving into automation, and operations staff who script repetitive tasks. The DevNet Associate study guide has 6 sections and about 1,803 words.
01Software Development and Design
Software development questions on this exam are mostly vocabulary and tradeoffs rather than deep coding. Know the software development lifecycle stages (requirements, design, implementation, testing, deployment, maintenance) and be able to contrast waterfall (sequential, heavy upfront documentation) with agile/iterative delivery (short sprints, continuous feedback).
296 words, about 1 min02Understanding and Using APIs
REST is an architectural style with constraints: client-server separation, statelessness (each request carries all needed context), cacheability, a uniform interface, and a layered system. Resources are addressed by URIs and manipulated with HTTP verbs.
312 words, about 2 min03Cisco Platforms and Development
Questions here ask which API, auth scheme, and endpoint family belongs to which Cisco product. You authenticate by POSTing credentials to /dna/system/api/v1/auth/token , receive a token valid for about one hour, then send it in the X-Auth-Token header.
308 words, about 2 min04Application Deployment and Security
Deployment questions contrast virtual machines (each with a full guest OS on a hypervisor) against containers (share the host kernel, start fast, package app plus dependencies as image layers). Docker builds and runs containers; Kubernetes orchestrates them into pods, services, and deployments with declarative manifests.
280 words, about 1 min05Infrastructure and Automation
Infrastructure as code (IaC) means describing desired state in files, versioning them, and letting a tool converge the system. Questions ask you to identify the tool from its defining traits.
297 words, about 1 min06Network Fundamentals
You need the OSI and TCP/IP models cold. OSI: physical, data link, network, transport, session, presentation, application.
310 words, about 2 min