Modern browsers, OS and DNS clients will cache IP addresses and other DNS information automatically.When a computer visits a website for the first time, it stores the website's DNS information in cache. The next time the computer visits a website, it looks in the cache to see if the website's information is present to use. This can cause problems if the website's DNS information has changed since the computer's last visit. Flushing the cache removes all the information stored in cache, forcing the computer to find the new DNS information for the website. Usually it is done in order to speed up the process and minimize requests for same hostnames. When IP addresses are changed or bad resualts are cached, its necessary to clear the DNS cache. DNS cache can be cleared via command line or from browsers also. Steps to flush DNS Cache for major operationg systems and browsers are explained.
Because of the system security policies run cmd as administrator user and follow below steps to flush DNS cache
To flush DNS on upgraded version of Windows is almost as easy as it is in the previous versions but due to Microsofts upgraded security system requirements you must run the command prompt with administrator privileges.
Given below steps will help you to clear your windows DNS cache .
Flushing the DNS in Mac OS X is an easy process, but the steps taken will depend on which version of OS X is running as your operating system.
If you are using Mac OS X 10.7 or 10.8, as your operating system you need to do the following:
If you are using Mac OS X 10.6, as your operating system ,you need to do the following:
If you are using Mac OS X 10.5.1 or below as your operating system , you need to do the following:
If you are running the nscd Name Service Cache Daemon then you will need to do the following.