Which layer of OSI is concerned with voltage levels, timing, and cable types?

Question

Accepted Answer

Physical Layer - The Physical Layer is the first layer of the OSI model. It is directly responsible for handling the physical aspects of network communication, such as voltage levels, signal timing, and types of cables and connectors.

This layer defines how devices are physically connected and how bits are transmitted over those connections. It deals with the hardware details that allow digital data to travel from one point to another.

Key responsibilities of the Physical Layer:

Defines voltage levels used for signaling
Manages signal timing and synchronization
Specifies types of cables, connectors, and pin layouts
Handles data in the form of raw bits


Interview Tip: If you are asked about anything related to cables, hardware signals, or how data is physically sent, the answer usually relates to the Physical Layer.

Conclusion: The Physical Layer focuses on the physical connection between devices, including voltage, timing, and cable types, making it a key part of real-world network setups.

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