Friday, March 22, 2013

P3,D1

                                            Security

                                                           Firewalls

                                                                    Why are firewalls used?

Within all software there must be some form of security in order to protect the computer and everything it contains. This can be something such as a 'firewalls' which are used in order to keep networks secure and free from viruses.

                                                                    How are firewalls used?

When browsing the Internet your PC is at risk of coming into contact with a virus from various different websites. However hackers are also knows to send them via email to you. In order to stop these viruses from damaging your computer in anyway the PC should be fitted with a firewall.
A Firewall is a piece of software which filters all of the information your computer is currently processing and just as the name suggests if any of this information seems dangerous or cannot be verified the Firewall would then stop the virus from processing into the computer.

                                             How does this improve computer performance?

Firewalls improve a computers perfomance as they prevent harmful viruses from entering the PC and in turn stealing information and damaging the system. This shows that firewalls improve a computers perfomance by stopping viruses from infecting the system and in turn ensuring the computer runs at a high speed to perfom needed tasks.

This is a link http://www.youtube.com/watch?v=otaMLI-hrro which will explain just how and why Firewalls are needed to ensure that PCs have the best security possible.

    Clean up tools

      Removal of cookies

Why is the removal of cookies needed?

 When an individual is surfing the Internet that website uses cookies in order to store your information. This information if mostly needed for your connivance so the website knows your preferences. However by this information being stored it can slow down your computers performance and so needs to be removed using a computers clean up tools.

How is the removal of cookies done?

How an individual removes cookies from their PC depends on the brand of computer in which they own as different brands of software will each have different methods. For example;

Windows-To remove cookies from most windows operated programmes you must search for a file on your computer named 'cookies' from there this file will show many types of cookies that you must use your mouse to highlight and then press 'delete'.

Apple Mac-In order to delete cookies from an apple system you must change your security preferences in order to reveal the hidden cookies. You then simply press delete to put the cookies in the bin.

How does this improve computer performance?

Cookies store unnecessary information on the computer and in turn slow down its performance. By deleting these cookies this improves a computers performance as the PC has less baggage and so can process information quicker therefore making the computer run at a faster rate.
This link will show you how to delete these cookies and in turn speed up your computers performance.http://www.youtube.com/watch?v=V0U4fZnr11c