Public DNS server is a generally available internet host served for translating symbolic domain name in IP address. Open servers can be used over ISP but with a support of organizations specializing in public DNS distribution. As a defining feature, free DNS is optimized to take the load of requests and can expose fast speed rather than ISP’s services which are gone down and defenseless against DNS attacks.
Google Public DNS
This is an alternative DNS server with closed source designed by Google corporation with aim to boost webpages loading by upgrading of data cashing efficiency and improves spoofing defense.
The corporation assures that Public DNS used for boosting process only and does not collect personal info. User IP address is stored in the system not longer than 48 hours, but concerning provider and location data, they are kept for 2 weeks. Top-secret information, such as user name and its physical address, isn’t collected by the company. It’s important to note that all stored info is used in technical purposes improving quality of services.
Nevertheless, Google is accused in focusing on self-interest and collecting user data succeeded by contextual advertising penetration in webpages.
This online system pursues public DNS servers on paid and free basis, corrects misprints in entered addresses and filters phishing websites. Unlike chargeable service turned ads off on a search page, free version can propose pages with banners under bad requests.
The company disposes its servers in strategically important locations resulting in making requests faster, thus increasing speeds of webpages opening. DNS-query results are cashed in operational system or applications, so the speed can be observed with cashing requests only.
Other provided opportunities include an anti-fishing filter, domains blocking and orthographical corrections (as an example, myipservices.cm is revised to myipservices.com). OpenDNS forms list with malicious websites and prohibits accessing to them. Moreover, they have launched Phishtank service where users of the whole world can check or add fishing websites.