Cisco exams are notorious for "tricky" questions. A free course might show you how to type a command, but you must understand the underlying theory. Ask yourself: What happens to the packet header at this layer? Why did the spanning tree block this specific port? Use the Official Exam Topics List
: Neil provides a massive amount of free content, including a Cisco CCNA Tutorials section and specific lab demos like Static NAT 2. Hands-On Lab "Fixes" ccna course free fix
Master IPv4 and IPv6 addressing. You must be able to subnet mentally to pass the exam. Cisco exams are notorious for "tricky" questions
: Offers free interactive games and practice drills. Why did the spanning tree block this specific port
: You must be able to subnet in your head or on scratch paper in under 60 seconds. Use free sites like subnetting.org to practice daily.
While he has a famous paid course on Flackbox/Udemy, his YouTube channel contains deep dives into the hardest CCNA topics that act as a perfect "fix" for areas where you might be struggling.