How the TCP/IP Model Actually Works | CCNA Day 3

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