You have the tools. You have the roadmap. Now, go fix your course—and go pass the CCNA.
| CCNA Topic Domain | Best Free Resource | The "Fix" for Gaps | | :--- | :--- | :--- | | (OSI, TCP/IP, IPv4 Subnetting) | Professor Messer’s N10-008 (Network+) videos (free on YouTube) | Use subnettingpractice.com (free) for daily drills. | | Routing (Static, OSPFv2/v3) | Jeremy’s IT Lab (Day 15 to 25) | Download his free OSPF lab PDF; many skip the metric calculation logic. | | Switching (VLANs, STP, EtherChannel) | NetworkChuck’s CCNA playlist (Entertaining, but shallow) | Fix: Watch Keith Barker’s "STP Deep Dive" (free on CBT Nuggets YouTube) afterward. | | Wireless & Automation | Cisco U. Free "Intro to SDN" module | The free course often lacks WLC configs. Fix: Watch "WLC GUI config" on David Bombal’s YouTube. | cisco ccna free course fix