Step by Step solution about How to resolve the algorithm DNS query step by step in the JavaScript programming language

Explanation:

1. This code demonstrates using the dns module in Node.js to perform a DNS lookup. Specifically, it looks up the IP addresses associated with the domain name www.kame.net.

2. The dns.lookup() function is called with two parameters:

• www.kame.net: The domain name to look up.

• { all: true }: An options object that specifies that we want to retrieve all IP addresses associated with the domain. By default, dns.lookup() only returns the first address.

3. The callback function is invoked when the DNS lookup is complete. It receives two arguments:

• err: If an error occurred during the lookup, this argument will be set to the error information. If not set, this argument is null.

• addresses: If the lookup was successful, this argument will be set to an array of IP addresses associated with the domain name.

4. The callback function logs the results of the DNS lookup to the console. If an error occurred, it prints the error message. Otherwise, it prints the array of IP addresses.

Example Output:

[ '180.95.125.192', '125.58.234.209' ]

const dns = require("dns");

dns.lookup("www.kame.net", {
             all: true
          }, (err, addresses) => {
              if(err) return console.error(err);
              console.log(addresses);
          })