- 2072 Kartik · 2 marks
Functions of physical layer
Short answer
Functions include bit representation and encoding, defining data rate, synchronization, physical topology, transmission mode, interface and media specification, and line configuration.
List out the functions of the physical layer in the TCP/IP reference model.
In the TCP/IP model the physical layer (together with the data link layer, called host-to-network layer) performs:
- Bit representation: converts bits (0s and 1s) into electrical, optical or radio signals (encoding).
- Data rate: defines how many bits are sent per second (bit duration).
- Synchronization: keeps sender and receiver clocks aligned at bit level.
- Physical topology: defines the arrangement of devices (bus, star, ring, mesh).
- Transmission mode: simplex, half duplex or full duplex.
- Interface and media specification: connectors, cables, pin layout, voltage levels.
- Line configuration: point-to-point or multipoint connection.
✓ Answer checked by Claude Opus 5.5 (high effort)
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