Frequency hopping is a wireless communication technique that rapidly switches the transmission frequency among a set of predetermined channels. This method helps to minimize interference and improve security by making it difficult for unauthorized listeners to intercept the signal. Originally developed for military applications, frequency hopping is now used in various technologies, including Bluetooth and Wi-Fi. By changing frequencies multiple times per second, devices can maintain a stable connection while avoiding crowded or noisy channels, ensuring clearer communication and reducing the risk of eavesdropping.