Save Big on Coursera Plus. 7,000+ courses at $160 off. Limited Time Only! Grab it Explore the inner workings of DNS in this comprehensive 30-minute video tutorial. Delve into the reasons behind DNS necessity, examine the hierarchical structure of DNS, and understand the process of recursive resolution. Learn about the continued importance of using names, the roles of SNI and ClientHello in secure connections, and the significance of caching in DNS operations. Investigate potential security risks like cache poisoning and gain insights into DNS forwarding. With detailed chapters and a whiteboard visual aid, master the fundamentals of how DNS functions in modern networks and web communications.