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WHAT IS A FIREWALL?

        Firewall is a network security system (combination of hardware and software) that prevents unauthorized access to the
        network. It monitors all the data packets entering or leaving the network and blocks malicious traffic like viruses and hackers.
        In most cases, operating systems such as Linux, Windows or Mac include firewall software as a part of the operating system
        thus keeping the computer secure. Sometimes you may need to configure your firewall for additional security. It is just like
        a security guard at the entrance of your house who will allow only authorised persons to enter and exit the house.


                CLEARING DATA STORED IN BROWSERS

        Browsers give you the facility of saving your user ID and password so that it saves you from the hassle of re-entering
        your user name and password on your frequently visited websites. This happens because the browsers have a password
        manager that saves all login credentials if permitted by the user. It is always a good practice not to save your user ID
        and password on a device which is shared or available to the public.

        If you wish to clear your login credentials in Google Chrome, then follow the given steps:
        Any Browser can also store data such as cookies, visited websites or web pages data, browsing history, etc. To clear this
        in Google Chrome follow the given steps:
        Step 1:  Click on three vertical dots on the right top corner of a Chrome browser window   .
        Step 2:  Goto Settings → Privacy and Security. The following window will open.





























        Step 3:  Click on Clear browsing data. The given window will be displayed.
        Select the required options and click on Clear data.






                                                                Short key  To open history of the
                                                                    browser


                                                                                 +
                                                                                    H
                                                                           Ctrl








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