This course makes up the first in a series looking at the LPI's LPIC-2 202 exam and covers in detail objective 207. This is most certainly a great resource for those preparing for the exam but, additionally, this has been written to be the definitive course on using DNS in Linux. We make sure that the advanced topics for the exam are covered and we see this both on CentOS and Ubuntu systems. We cover BIND 9, DNSMAsq, and PowerDNS. In today's workplace, security has to be taken seriously and, in the module titled "Configuring DNS Security," we cover TSIG keys as well as setting up signed zones with DNSSEC.