Thursday, March 07, 2013

What DNS does

A DNS(Domain Name System) converts the user friendly Hostnames(like hotmail.com) which users can understand, to IP Addresses- which the computer systems and networks can understand.

When you type www.hotmail.com in your browser, the browser performs a search (or lookup) to find the machine readable IP Address to communicate with the host(the hotmail server).
So the browser first contacts with the DNS Server set up by your ISP, and tries to look up for the IP conversion of the hostname it wants to contact.




The browser first looks for translation in the Primary DNS Server. If a match is not found, then the browser contacts the Secondary DNS Server, located somewhere on the Internet. If a match is found on the Secondary DNS Server then the Primary DNS Server updates its database.

It is a time-consuming process and can really slow down anybody's surfing speed as a lot of time is wasted while the browser contacts the DNS and performs the search... What strikes the mind as soon as this process becomes clear is that, "Why is my system contacting the DNS Server each time when I want to visit a site?"
"Can we create a DNS reference table for our system on our local system?"
Well, YES! IT IS POSSIBLE! The answer lies in the "Host" file in Windows Directory.

Continue Reading: How to boost Internet Speed

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