DNS Practice Exercises: Essential Techniques for Mastering the Framework

Here’s a short practice exercise about DNS:

1. Open a command prompt on your computer.
2. Type “nslookup” followed by a domain name, such as “google.com”.
3. Look at the output of the command. It should display the IP address of the server that hosts the website.
4. Try typing in a different domain name, such as “facebook.com” or “amazon.com”, and see what IP address is returned.
5. Try changing the DNS server your computer is using by following the steps outlined in the previous tutorial. You can use a free public DNS server such as Google Public DNS or Cloudflare DNS.
6. Repeat steps 2-4 and compare the IP addresses returned with the previous results. Did the DNS server change make a difference in the results?

This practice exercise will give you a basic understanding of how DNS works and how to use the nslookup command to look up the IP address of a domain name. It will also help you understand how changing the DNS server on your computer can affect the results of a DNS lookup.