Network neutrality is the principle that all Internet traffic should be treated equally.[8] Internet traffic includes all of the different messages, files and data sent over the Internet, including, for example, emails, digital audio files, digital video files, etc. According to Columbia Law School professor Tim Wu, the best way to explain network neutrality is that a public information network will end up being most useful if all content, websites, and platforms (e.g., mobile devices, video game consoles, etc.) are treated equally.[9] A more detailed proposed definition of technical and service network neutrality suggests that service network neutrality is the adherence to the paradigm that operation of a service at a certain layer is not influenced by any data other than the data interpreted at that layer, and in accordance with the protocol specification for that layer.[10]