how DNS resolver is happening.

How DNS Resolution Works: From URL to Website

When you type a website URL into your browser, a process happens in milliseconds to connect you to the server.

Step by step process:

• Step 1: User Enters URL
  the desired domain is entered

• Step 2: Browser Cache Check
  Browser first checks if it already knows the IP address from a previous request then the process stops here.

• Step 3: OS Cache Check
  If the browser does not have the record, the operating system checks its local DNS cache.

• Step 4: Query to DNS Resolver
  If no cached result exists, the request is sent to a DNS resolver (ISP).

• Step 5: Resolver Queries Root Server
  The resolver asks a root name server, The root server responds with the address of the TLD server for .com.

• Step 6: Resolver Queries TLD Server
  The resolver then asks the .com TLD server, The TLD server responds with the authoritative name server for that domain.

• Step 7: Resolver Queries Authoritative Server
  The resolver asks the authoritative server, The authoritative server responds with the correct IP address.

• Step 8: Response Returned to Client
  The resolver sends the IP address back to your browser.

• Step 9: Browser Connects to Server
  Now that the browser knows the IP address, it sends an HTTP/HTTPS request to the web server, and the website loads.

All these steps happen a few milliseconds but still a server can process request from all across the globe