How DNS Works: Domain Names, IP Lookups & nslookup Explained (Networking Basics)
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In this lesson, we break down DNS (Domain Name System)—the service that lets you type easy-to-remember domain names instead of long IP addresses. You’ll learn how a DNS resolver receives your query, how it looks up Fully Qualified Domain Names (FQDNs), and how it returns the IP address needed to connect to a website. We walk through DNS servers assigned by DHCP, how recursive lookups work, authoritative vs non-authoritative responses, and how to test your own DNS queries using the nslookup command. By the end, you’ll clearly understand how DNS functions as the “speed dial” of the internet and how name resolution enables all web browsing to occur.
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