Free CCNA fundamentals course

Ivan Velichko’s tutorial series appears on the iximiuz Labs catalog as “Computer Networking Fundamentals — For Developers, DevOps, and Platform Engineers,” hosted under the iximiuz Labs course listing. (labs.iximiuz.com) The course description states it concentrates on the Data Link (Ethernet) layer and the Internet (IP) layer, described on the site as a “heavily illustrated introduction to the first two layers of Computer Networking.” (iximiuz.com) The curriculum pairs colorful, diagram-driven explainers with step‑by‑step labs according to the course page, and those labs are implemented as reproducible exercises on the platform. (labs.iximiuz.com) iximiuz Labs advertises interactive “Playgrounds” — remote sandboxes for running the hands‑on exercises and experimenting with network tooling directly in the browser. (labs.iximiuz.com) The course marketing explicitly targets developers, DevOps, and platform engineers as a prep step before higher‑level topics like TCP/UDP and HTTP, positioning it as a foundational primer rather than a full CCNA curriculum. (labs.iximiuz.com) Cisco’s CCNA exam blueprint lists “network fundamentals” and IP connectivity among core tested areas, so materials that focus on Ethernet + IP map directly to the CCNA’s foundational domain. (cisco.com 1) (cisco.com 2) iximiuz Labs’ platform summary reports tens of thousands of interactive challenge solutions accepted (the public catalog notes “Solutions accepted 29.9K”), indicating active usage of its hands‑on content across tutorials and labs. (labs.iximiuz.com)