Understanding the Domain Name Service or DNS is imperative in IT today. Knowing what is supposed to happen when connecting to web sites and various services throughout your network relies heavily on DNS. In this course, Deep Dive: Domain Name Service (DNS), you'll learn about DNS query and responses at the packet level. Second, you'll learn all about how DNS referrals work, learning about when one DNS server refers to another for information. Finally, you'll learn how to troubleshoot DNS using log files, command line utilities, and how to capture data packets using Wireshark. By the end of this course, you'll have a firm grasp of DNS and be able to master the packet level.