Physical Layer

This collection covers the fundamentals of the physical layer in network communications, detailing its role in signal transmission over various mediums. It explains concepts such as signal encoding, synchronization, and the limitations imposed by attenuation, distortion, and noise. Additionally, the material delves into the OSI model, outlining its seven layers and their functions, with a focus on the interactions between the physical, data link, and network layers. Performance metrics and the impact of bandwidth on data rates are also discussed.