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We will review in class how the Domain Name Service works. You should also read in your own time the [https://en.wikipedia.org/wiki/Domain_Name_System#Address_resolution_mechanism Address resolution mechanism] section (including the '''Recursive''' and '''caching name server''' subsections) on '''Wikipedia for an overview of a DNS query'''. The diagram shown in the WIKI is also quite simple and easy to understand. Domain Name Service is a LARGE topic but this lab provides the basic principles and essentials for this course and DNS set-up for other courses.
We will <u>not </u> be setting up our server to do [https://en.wikipedia.org/wiki/Reverse_DNS_lookup Reverse DNS Lookups] but you are expected to understand the difference, in particular you should understand that:
:* Your registrar (whomever you pay for your domain, even if you run your own DNS server) is responsible for '''normal (forward) DNS resolution''' of your domain.
:* Your ISP (whomever you pay for your internet connection, i.e. the company that assigned a public IP to your server) is responsible for '''reverse DNS lookups''' for your IP.
