Как на самом деле работает модель TCP/IP | CCNA, день 3

In this video the presenter introduces the TCP/IP model, beginning with an overview of protocols and standards (0:00) and a brief history (1:45). He explains who sets the standards (3:27) and discusses the multi‑layered nature of networking (5:07). Using analogies, he compares sending a letter (7:08), building the model (9:45), and dividing the levels (11:31). The core TCP/IP model is then presented (13:03), followed by detailed explanations of each layer: the physical layer (14:43), the LAN layer (19:57), the Internet layer (21:14), the transport layer (23:19), and the application layer (24:24). He covers encapsulation and decapsulation (26:03), protocol data units (27:48), interactions between adjacent layers (31:06), interactions within the same layer (33:11), and level separation (34:19). The video concludes with a comparison to the OSI model (35:04), other versions (36:14), a review (38:36), and a final conclusion (39:34).