Various wireless mediums have no doubt made our lives easier and more convenient in a wide range of different ways over the years — but they certainly aren't perfect. Wireless transmissions, especially RF transmissions, are both noisy and unreliable by their very nature. In an effort to provide reliable data delivery, to control access to a naturally shared medium and to protect the integrity of the data being delivered in the first place, companies use techniques like the Clear Channel Assessment to help accomplish all of these things and more.