[$] So you think you understand IP fragmentation?

What is IP fragmentation, why is it important, and do people understandit? The answer to that last question is "not as well as they think". Thisarticle will also answer the rest of thosequestions and introduce fragquiz, a game that Iwrote to allow players to guess how IP packets will behave when they aretoo large for the network. As evidence that IP fragmentation is notwell-understood, a room full of networking experts played fragquiz and gota score that wasnowhere close to perfect. In addition, I will describe a new algorithm forfragmentation avoidance, which some colleagues and Ideveloped, that helped motivate development of fragquiz.