Domain Name System

In this episode, we introduce the Domain Name System (DNS), the critical backbone of the internet that translates human-friendly domain names like "educative.io" into machine-readable IP addresses. We explore the hierarchical structure of DNS, where name servers work together to efficiently map domain names to IP addresses. We also dive into the different types of DNS resource records, explaining how they store name-to-value mappings, and how DNS leverages caching to boost performance and reduce query load. Additionally, we discuss the distributed, scalable, and reliable nature of DNS, including its use of replication and eventual consistency for updates. Finally, we take a hands-on look at practical DNS troubleshooting using tools like nslookup and dig. Join us to gain a deeper understanding of how DNS keeps the internet running smoothly!