Free CCNA 200-301 Course: TCP/IP and OSI models explained

What is the OSI Model? What is the TCP/IP Model? Why do we care? Learn the foundations to pass the CCNA 200-301 exam
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What is the OSI Model?
What is the TCP/IP Model?
Why do we care about models?
What are the differences between the OSI and TCP/IP Models?
What are bits, frame, packets and segements?
What are layer 1,2,3 and 4 devices?


  • You want to learn about networking
  • You have a computer that allows you to watch this course online
  • Basic understanding of computers


This is a Free CCNA 200-301 Course that covers the OSI and TCP/IP models. This course covers knowledge that you need for the CCNA exam, but also for the CompTIA Network+ exam. Learn the fundamentals and basics of networking.

Why do you need to learn the TCP/IP and OSI models? Are they important to know? Yes - you need to know these models for both the CCNA exam, but also for the real world.

People in the real world argue about this, but models like the OSI and TCP/IP help with both understanding and network troubleshooting. Make sure you learn especially the TCP/IP model for the CCNA exam.

The Cisco Certified Network Associate (CCNA) is highly recommended as your first certification if you want to become a network engineer. To become a CCNA, you need to pass the CCNA 200-301 exam.

Start with your CCNA exam and then look at furthering your career by becoming a CCNP (Cisco Certified Network Professional) or DevNet Associate.

If you continue with your studies, you could one day become a Cisco Certified Network Expert (CCIE) - one of most highly regarded certifications in the networking industry.

This course is part of my full CCNA course on Udemy. I've made this part of the course free (and others) so you can start learning today and change your life. Don't wait. Start studying today.

Who this course is for:

  • This course is for anyone who wants to attain the Cisco CCNA certification
  • You are studying for your CompTIA Network+ exam

Course content

1 section7 lectures51m total length
  • TCP/IP Model 1
  • Udemy tips and tricks
  • Answering your questions
  • TCP/IP Model Part 2
  • TCP/IP Model Part 3
  • TCP/IP Model Part 4
  • Bonus Content


CCIE #11023, over 15 years of network training experience
David Bombal
  • 4.6 Instructor Rating
  • 117,982 Reviews
  • 941,647 Students
  • 50 Courses

David Bombal (CCIE  #11023 Emeritus) passed his Cisco Certified Internetwork Expert Routing and Switching exam in January 2003 and is one of a small percentage of Cisco Engineers that pass their CCIE labs on their first attempt. 

David qualified as a  Cisco Certified Systems Instructor (CCSI #22787) many years ago! He has been training Cisco  courses for over 15 years and has delivered instructor led courses in various  countries around the world covering a wide range of Cisco topics from CCNA to  CCIE. 

David is very active on social media and has over 500,000 YouTube subscribers and has posted over 1,000 free videos.