Addressing the challenges of modern DNS a comprehensive tutorial

The Domain Name System (DNS) plays a crucial role in connecting services and users on the Internet. Since its first specification, DNS has been extended numerous documents to keep it fit for today’s challenges demands. And these are many. Revelations of snooping traffic led changes guarantee confidentiality queries. Attacks forge shore up integrity DNS. Finally, denial-of-service attack operations have new architectures. All developments make highly interesting, but also challenging research topic. This tutorial – aimed at graduate students early-career researchers provides overview modern DNS, ongoing development open challenges. four major contributions. We provide comprehensive protocol. Then, we explain how is deployed practice. lays foundation third contribution: review biggest faces today they can be addressed. These (i) protecting (ii) guaranteeing information provided (iii) ensuring availability infrastructure, (iv) detecting preventing attacks that use Last, discuss which remain open, pointing reader towards areas.