The physical layer of a network________________?
Correct answer: C. defines the electrical characteristics of signals passed between the computer and communication devices
- A. constructs packets of data and sends them across the network
- B. controls error detection and correction
- C. defines the electrical characteristics of signals passed between the computer and communication devices
- D. All of the above
Explanation
The physical layer specifies how bits are represented and transmitted, including the electrical characteristics of signals and interfaces. Packet construction and error detection or correction belong to higher layers, so “All of the above” is incorrect.
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