Which of the following is NOT considered a physical layer problem?

The correct answer is based on understanding the distinctions among different layers defined by the OSI model. The physical layer concerns itself with the raw transmission of data over physical mediums. This includes how signals are transmitted through cables, and it directly addresses problems like cable breakage, interference, and signal attenuation.

Wireless communication, while it can involve physical layer aspects, is often more complex and incorporates elements from higher layers as well. Problems associated with wireless communications can stem from various sources, including environmental factors, network protocols, and even interference, which complicates the picture beyond simple physical layer issues. Therefore, while wireless technology operates at the physical layer, the issues related to it are not solely confined to the physical layer.

Interference, cable breakage, and signal attenuation all represent straightforward physical layer challenges that pertain directly to the medium and its characteristics. In contrast, wireless encompasses a broader context that requires consideration of multiple layers in terms of network performance and reliability. This distinction helps clarify why wireless is viewed as a more complex problem that does not strictly fit within the confines of physical layer issues.