Well i have been using PTCL for almost 5 years... been with their standard DNS... found quite upshifts and down lags... although sometimes it sure remained constant... but just wanted to share... been using google DNS for almost like 2 years... and have to say... they have been much stabler...
What is Google Public DNS?
Google Public DNS is a free, global Domain Name System (DNS) resolution service, that you can use as an alternative to your current DNS provider.
To try it out:
Configure your network settings to use Preferred DNS (220.127.116.11) & Alternate DNS (18.104.22.168)
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Why does DNS matter?
The DNS protocol is an important part of the web's infrastructure, serving as the Internet's phone book: every time you visit a website, your computer performs a DNS lookup. Complex pages often require multiple DNS lookups before they start loading, so your computer may be performing hundreds of lookups a day.
Why should you try Google Public DNS?
By using Google Public DNS you can:
Speed up your browsing experience.(YES IT DOES)
Improve your security.(DONT REALLY NEED THAT MUCH)
Get the results you expect with absolutely no redirection.(YES IT DOES)