At which layer would you find errors that were caused by EMI?
A) Data Link
B) Transport
C) Physical
D) Network

Question

Quizplus · Accepted Answer

Errors caused by EMI (electromagnetic interference) occur at the physical layer, which is responsible for transmitting and receiving raw data bits over a communication channel. This layer deals with the electrical, mechanical, and timing interfaces to the physical medium, such as copper wires, optical fibers, or radio waves. The physical layer ensures that the transmitted bits are converted into signals that can be propagated through the medium without distortion or attenuation. However, EMI can disrupt this process by introducing noise, crosstalk, or attenuation, which can result in corrupted, delayed, or lost bits. Therefore, it is crucial to shield or filter the physical connections, especially in high-speed or long-distance communications. The other layers, such as the data link, transport, or network, operate on top of the physical layer and assume that the transmitted data is error-free. They may detect and correct some types of errors using error detection codes, retransmission protocols, or routing algorithms, but they cannot prevent or mitigate EMI-related errors.

At Which Layer Would You Find Errors That Were Caused