What is DNS?

While our email and browsers use names (eg: www.google.com),
the Internet uses TCP address to access the data.

A website owner purchases a Domain Name (the google.com portion) and the
registrar assigns a TCP address to that name forming an association of

name -> ip address

When we ask the browser for example to access the http : // www.google.com/
the DNS soves the question, what ip address has that data?

Here's the steps
As you can see, that's two trips to the Internet to get one display and that takes twice the time.
This is where our DNS Client service saves that name -> ip address association so that our
PCs don't need to ask the DNS over and over for the same thing.
Next time we need name -> ip address, we get that locally from our DNS Client and make
only the direct access for

Request http data using ip-address-of-google.com

__________________
J. O. Beard; you + tech-101.com => synergism. Secure your system now