This PowerPoint covers the key topics and concepts from CCNA 1 v3.0 Module 3 on networking media. It provides an overview of the module's objectives and topics to be covered, which include atoms and electrons, voltage, resistance and impedance, current flow, cable specifications, different cable types (coaxial, twisted-pair, fiber), the electromagnetic spectrum, light propagation, wireless LAN standards and components. The document is intended for instructors to modify for their own use, and is not a study guide for assessments or CCNA certification exams.