Welcome to LWN.net The following subscription-only content has been made available to you by an LWN subscriber. Thousands of subscribers depend on LWN for the best news from the Linux and free software communities. If you enjoy this article, please consider subscribing to LWN. Thank you for visiting LWN.net! The origins of the TCP and UDP network protocols can be traced back a full 50 years. Even though networks and their use have changed radically since those protocols were designed, they c...