Your home by purchasing a hardware firewall with nat

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your home by purchasing a hardware firewall with NAT capabilities. Many routers sold for home use are also configured as firewalls, and many feature NAT. 7.11 Explain how to protect your computer from virus infection. • Antivirus software • Detects viruses and protects your computer • Popular programs: Symantec, Kaspersky, AVG, McAfee Antivirus software is specifically designed to detect viruses and protect your computer and files from harm. Symantec, Kaspersky, Trend Micro, and McAfee are among the companies that offer highly rated antivirus software packages. Antivirus protection is also included in comprehensive Internet security packages such as Norton Security, Trend Micro Internet Security, and McAfee Total Protection. These software packages also help protect you from threats other than computer viruses. For example, Windows 10 includes Windows Defender, which defends against malware as well as viruses. Although antivirus software is designed to detect suspicious activity on your computer at all times, you should run an active virus scan on your entire system at least once a week. By doing so, all files on your computer will be checked for undetected viruses. Current antivirus programs run scans in the background when your CPU is not being heavily utilized. But you can also configure the software to run scans at times when you aren’t using your system—for example, when you’re asleep. Alternatively, if you suspect a problem, you can launch a scan and have it run immediately. The main functions of antivirus software are as follows: • Detection: Antivirus software looks for virus signatures in files. A virus signature is a portion of the virus code that’s unique to a particular computer virus. Antivirus software scans files for these signatures when they’re opened or executed and identifies infected files and the type of virus infecting them. • Stopping virus execution: If the antivirus software detects a virus signature or suspicious activity, such as the launch of an unknown macro, it stops the execution of the file and virus and notifies you that it has detected a virus. It also places the virus in a secure area on your hard drive so that it won’t spread to other files; this procedure is known as quarantining. Usually, the antivirus software then gives you the choice of deleting or repairing the infected file. Unfortunately, antivirus programs can’t always fix infected files to make them usable again. You should keep backup copies of critical files so that you can restore them in case a virus damages them irreparably. 84
• Prevention of future infection: Most antivirus software will also attempt to prevent infection by inoculating key files on your computer. In inoculation, the antivirus software records key attributes about your computer files, such as file size and date created, and keeps these statistics in a safe place on your hard drive. When scanning for viruses, the antivirus software compares the attributes of the files with the attributes it previously recorded to help detect attempts by virus programs to modify your files.

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