Free Software-Defined Networking (SDN) course for 2026 by a Triple CCIE — built for CCNA/CCNP/CCIE candidates and network engineers transitioning to modern automated networks. You'll cover network management fundamentals, SNMP, traditional vs SDN architectures, the SDN controller model, OpenFlow, southbound/northbound APIs, intent-based networking, network automation basics (Ansible/Python intro), Cisco SD-Access and SD-WAN concepts, and DNA Center overview. Perfect free starter path before enrolling in CCNA 200-301, ENCOR, ENARSI, SDA, or SD-WAN 300-415 tracks. Network Automation/SDN Engineer roles pay $95K–$160K USD globally. Free lifetime access. Enroll today and start your SDN/network automation journey.