Free CCNA v1.1 200-301 | Complete Course 2026 - How the TCP/IP Model Actually Works | CCNA Day 3

Check out my CCNA books, ACING THE CCNA EXAM Volume 1 and Volume 2! 🌴Amazon || Vol 1: https://jitl.jp/book1-az Vol 2: https://jitl.jp/book2-az Vol1/2 Set: https://jitl.jp/books-az 📖 Direct from the publisher || Vol 1: https://jitl.jp/book1-yt Vol 2: https://jitl.jp/book2-yt 📚Boson ExSim: https://jitl.jp/ccna-exsim ← the BEST practice exams for CCNA 💻Boson NetSim: https://jitl.jp/ccna-netsim ← 100+ detailed guided labs for CCNA 💯ExSim + NetSim: http://jitl.jp/ccna-kit ← get BOTH for a discount! 🥇CCNA Gold Bootcamp: https://www.flackbox.com/cisco-ccna-course#jm1 ← the course I used to get my CCNA (top rated course on the Internet) Compare the different versions of my course and find the links: https://jitl.jp/ccna-comparison SUPPORT MY CHANNEL The best way to support my channel is to like, comment, subscribe, and share my videos to help spread the word! If you can spare to leave a tip, here's my PayPal: https://paypal.me/jeremysitlabYT 0:00 Introduction 1:45 Protocols and Standards 3:27 A bit of history 5:07 Who defines the standards? 7:08 Layered models 9:45 Analogy: sending a letter 11:31 Analogy: building a model 13:03 Analogy: separation of layers 14:43 The TCP/IP model 19:57 Layer 1: Physical Layer 21:14 Layer 2: Local Network layer 23:19 Layer 3: Internet layer 24:24 Layer 4: Transport layer 26:03 Layer 5: Application layer 27:48 Encapsulation & decapsulation 31:06 Protocol data units 33:11 Adjacent-layer interaction 34:19 Same-layer interaction 35:04 Separation of layers 36:14 The OSI model 38:36 Other versions 39:34 Review 40:52 Outro #cisco #CCNA