Which frequencies are commonly used for wireless communications?

The choice of frequencies that are commonly used for wireless communications is centered on efficiency, availability, and operational characteristics. The 2.4 GHz and 5 GHz bands are widely recognized as the primary frequencies for Wi-Fi communication, primarily due to their balance between coverage area and data transmission rates.

The 2.4 GHz band is particularly significant because it offers a longer range compared to higher frequencies, making it effective for general household and outdoor use. It also penetrates walls and obstacles more effectively, which is why it's commonly used in various devices such as home routers, smartphones, and more.

The 5 GHz band, while having a shorter range, supports higher data rates and is less prone to interference from other devices. This band is becoming increasingly popular as the demand for higher bandwidth applications, such as streaming video and online gaming, continues to grow.

Overall, the use of these two bands allows for flexible deployment in different environments and usage scenarios, making them the standard frequencies for modern wireless communication systems.