Net neutrality (network neutrality) is the principle that internet service providers should facilitate access to all content and applications across the internet irrespective of the source and not favour or block any websites or products. It implies not charging differentially for different users, or for different content, website, application, platform, attached equipment type, or the communication mode. It also entails governments to follow this principle of neutrality or net equality. The principle is also called internet neutrality. This term was first devised by Tim Wu in 2003. Wu is a Columbia University professor of media law. He used this term as an extension of the older concept of ‘common carrier’. A famous example of net neutrality violation was when the ISP Comcast stealthily reduced the speeds of uploads from peer-to-peer file sharing applications.