Which layer of the OSI model would you check for issues related to signal strength and transmission quality?

The Physical layer of the OSI model is responsible for the actual transmission and reception of raw bitstreams over a physical medium. This layer deals with the hardware aspects of networking, including the cables, switches, and radio frequencies used for communications. When troubleshooting issues related to signal strength and transmission quality—such as attenuation, interference, and physical connections—it's essential to examine the Physical layer.

This layer includes components like wiring, connectors, and network interface cards, which all play a crucial role in how effectively signals are transmitted and received. Problems at this level can manifest as slow data transfer rates, dropped connections, or corrupted data, all of which are directly tied to the quality of the physical medium and the strength of the signal being transmitted.