In this video, you’ll learn about the Physical Layer (Layer 1) of the OSI model, which is the foundation of all network communication. This layer is responsible for transmitting raw bits (0s and 1s) over a physical medium, whether that’s copper cables, fiber optics, or wireless signals.

The lesson explains how the Physical Layer defines hardware components, electrical signals, voltages, data rates, connectors, and media types. You’ll also understand the role of devices like hubs, repeaters, cables, and network interface cards (NICs) at this layer. Unlike higher layers, it doesn’t deal with addresses or error checking—its sole focus is on moving bits across the medium.

By the end of this video, you will understand how the Physical Layer provides the essential hardware and transmission standards that make communication between devices possible, serving as the base of the OSI model.