First of all what is DNS?
DNS stands for Domain Name System. It is an Internet service that translates domain names or host name into IP address. Our machine does not understand Host names, they identify websites using IP address. When u enter a website name in url bar of your browser the browser sends the request to a DNS server to resolve the website name and it returns a IP address.When IP address of website is received browser contacts the IP address and displays the Website. For eg: www.google.com might be translated to 209.85.231.104. Now you might have understood what are DNS so lets move a step ahead and discuss whats is DNS server. A DNS server is a dedicated machine or server or a service within a machine that provides name resolution in an IP network. It changes names of websites and other network resources to numeric IP addresses.
Now the question arises what is a public DNS server?
Most of the DNS servers are private i.e. they provide services to a company who owns and configures them.Example if you are using airtel or mtnl broadband connection they provide their private DNS servers. It means a Mtnl user cannot use airtel DNS servers. But there are some DNS server available on the net that provide DNS resolution to anyone who requests it to them. These are called public DNS servers. These servers are used by people for faster and safer browsing. You can use these servers as an alternative to your private DNS servers.Some public DNS servers are
1. Google
- 8.8.8.8
- 8.8.4.4
2. ScrubIt Public dns server address:
- 67.138.54.100
- 207.225.209.66
3. dnsadvantage free dns server list:
- 156.154.70.1
- 156.154.71.1
4. OpenDNS
- 208.67.222.222
- 208.67.220.220
5. vnsc-pri.sys.gtei.net
Public Name server IP address:
- 4.2.2.1
- 4.2.2.2
- 4.2.2.3
- 4.2.2.4
- 4.2.2.5
- 4.2.2.6
In my next post I will discuss about how to use these public DNS step by step. So please visit again !!!
You forgot to mention that OpenDNS is much better than Google DNS. I feel you should have placed OpenDNS over other DNS services. None the less, nice article.
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What situation should I change the dns server? In case of my provider dns server is down?
Thats one case, and some times the dns server of the ISP will be slow or it will not resolve some domain names.
You can use open dns servers in all the above cases.
thnks guys for the appreciation
don’t forget to read next article
http://techbu.com/2010/08/01/how-to-use-public-dns/
thank you, for this great info.
Woooooooo….
We use internet everyday but I was not known to many of the things mentioned here
thnks J.b
i have posted the next part
you all can read it here
http://techbu.com/2010/08/01/how-to-use-public-dns/
I certainly would love to learn more about how to use the dns servers. awiaiting next post.
@lazaac thnks ill post next part soon
@pranav DNS servers are essential part of your Internet Protocol, i already told in article that they convert your website name to ip address
without DNS you cannot open a single site
@rahul thnks and google and vnsc are really good i have tried them
Which of them is the fastest? I guess some of them are faster than others.
By the way, a really good article. Nice and simple.
but how do dns servers speed things up???
how they add to the security?
r they really useful?
thanks for the info… i’ll wait for next post.. thanks again… i can understand what DNS is all about..