Which of the following is generally NOT considered a source of wireless signal interference?

Signal boosters are generally designed to amplify or enhance wireless signals, making them an essential tool for improving connectivity rather than introducing interference. They operate by taking an existing signal, amplifying it, and then retransmitting the strengthened signal to areas where the signal is weak. This function helps improve the overall performance and reliability of wireless networks.

In contrast, other sources like microwave ovens, other wireless networks, and physical barriers such as walls can create significant interference. Microwave ovens can emit electromagnetic radiation in similar frequency ranges to those used by some Wi-Fi networks, which may lead to disruption of the signal. Other wireless networks can cause interference through overlapping frequencies, leading to congestion and reduced performance. Additionally, physical barriers can weaken wireless signals by obstructing them, resulting in a less reliable connection. Thus, signal boosters stand apart as a tool for enhancement rather than a source of interference.