In this course you will learn the Domain Name System (DNS) main concept, understand the concept of DNS server, learn how to distinguish the different types of Domain Name Servers, and learn how to configure an intranet DNS server on a Windows Server 2012 operating system r2 and Ubuntu 16.04 LTS. Finally, you will learn about severe cyber attacks that exploit DNS servers vulnerabilities: DNS Spoofing andDNS cache poisoning.