What problem does the DNS solve? How does the DNS help the world wide web scale so that billions of users can access billions of web pages?

DNS is subject to solve the problem of translating domain names into IP addresses.  

DNS relies on TCP and IP. DNS helps the world wide web scale because it is an Internet Protocol, used by numerous computers that are connected to the network of networks. DNS is responsible for many tasks, but the most important is to solve the IP address of the website we are “requesting” to use.

Explanation:

In depth, DNS takes the URL of the website (that we have entered) and converts it to the corresponding IP address. Additionally, using DNS allows the user of the computer to have a better internet connection, higher security, etc.

When one web server forwards you on to another web server, DNS gets you to the IP address of the first web server.

After the browser of your computer establishes an IP connection, it “speaks” HTTP and requests some contact, which is usually a web page.

In other words, the “Domain Name System” (DNS) translates human-readable domain names to machine-readable IP addresses.

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