Episode 69: DNS Essentials — Records, Resolution, and Queries
This episode examines the Domain Name System (DNS), which translates hostnames into IP addresses. It introduces common record types such as A, AAAA, MX, and CNAME, as well as the process of recursive and iterative resolution. DNS is a critical exam topic because it underpins nearly every Internet service and is a common point of troubleshooting.
The discussion expands with scenarios, such as mail servers depending on MX records, websites requiring proper A and AAAA records, and CNAMEs enabling aliasing. Troubleshooting examples include diagnosing unreachable domains due to missing records, misconfigured forwarders, or cache poisoning. By learning how DNS operates and how to resolve common problems, you’ll be well-prepared for both exam questions and real-world challenges. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your certification path.
