How clear is DNS cache in client Machine ?

AT TIMES PERSONAL COMPUTER'S OR LAPTOP'S WILL be UNABLE TO CONNECT INTERNET.THERE ARE 2 MAIN CONCERN'S FOR THIS ISSUE .THE FIRST IS DUE TO DNS AND OTHER IS DUE TO CHANGE IN THE IP .

FOR CLEARING THE DNS CACHE ON CLIENT MACHINE we need to go command prompt i,e cmd ..command prompt will open.then type IPCONFIG /FLUSHDNS..THEN PRESS ENTER.

It will display the message successfully resovle the DNS cache.

The 2 issue is changing the dhcp ip .

To resolve it go to cmd type ipconfig /renew

IT it will renew the ip and issue is get solved.

then to exit from the cmd prompt.

Start>cmd>

ipconfig/flushdns

Use flushdns using command in windows 

1. Click Start.
2. Enter cmd in the Start menu search text box.
3. Right-click Command Prompt and select Run as Administrator.
4. Run the following command: ipconfig /flushdns. If the command succeeds, the system returns the following message:

Go to Run>>CMD>>by using command ipconfig /flushdns

On your local machine, click Start and select Run

type command and click Ok

Within the prompt, type ipconfig /flushdns

The following article explains how to flush a computer's DNS cache. 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.

start-cmd

ipconfig /flushdns

For windows operating system. 

1. Click Start 

2. Enter cmd in the start menu search text box. 

3. Right - click Command Prompt and select Run as Administrator

and 4. Run the following command: 

1. ipconfig /flushdns   

For your personal computer you can put below command to clear DNS cache

ipconfig /flushdns

If I understood your question. To clear the dns cache

ipconfig /flushdns

then to get new addresses,

ipconfig /registerdns   (for this you'd need to run cmd as an administrator.

You can run both commands in a one liner

ipconfig /flushdns && ipconfig /registerdns

You can also view the dns entries in your pc's cache by doing the command.

ipconfig /displaydns

this can be a big list so you can save it into a text file using the redirction into a file such as

ipconfig /displaydns >c:\\displaydns.txt

Another thing I almost forgot to mention is your hosts file where you can save static dns entries. it is located in your drivers\\etc folder in your system32 folder.