World of Computer Networking Your CCNA start - Protocol Data Units (PDUs)

The video tutorial explains the concept of Protocol Data Units (PDUs) and their role in the OSI model. It begins with an introduction to bits as the smallest unit of data transmission in the physical layer. The OSI model is divided into media and host layers, with each layer having specific PDUs: frames for the data link layer, packets for the network layer, segments for the transport layer, and data for the application, presentation, and session layers. The tutorial also covers various protocols used in these layers, such as HTTP, FTP, TCP, and UDP, and their interaction with PDUs. The session concludes with a summary of the key points discussed.

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