Layer 1: Physical
The Physical Layer is responsible for the physical connection between devices. It defines the physical and electrical specifications for devices.
Key Points
- Deals with bit-level transmission
- Defines cable types and connectors
- Specifies voltage levels and timing of electrical pulses
- Examples: Ethernet cables, fiber optic cables, wireless radio frequencies
- Manages physical network topologies
- Handles bit synchronization and transmission rates
RFC References