What problem is specifically referred to as crosstalk?

Crosstalk refers to the unintended transfer of signals between communication channels, typically occurring in telecommunication systems where signals from one channel inadvertently interfere with signals from another. This phenomenon can happen when the electromagnetic fields of adjacent wires or cables interact, leading to the mixing of signals. This can be particularly problematic in environments where many wire pairs are bundled together, such as in structured cabling for data networks.

Accidental detection of signals from another wire captures this essence well, as it highlights the issue of one channel unintentionally picking up signals from a neighboring channel, which can cause errors and degradation in communication quality.

The other options, while they deal with various issues in communication and signal quality, do not accurately capture the definition of crosstalk. Signal loss over distances pertains more to attenuation. Interference from external devices relates to external sources affecting communication, rather than internal channel interference. Delays in data processing are indicative of latency issues, which do not specifically correlate with the concept of crosstalk.