Security
It is necessary to protect yourself and your computer from criminals on the Internet. Theses criminals are called hackers. They can do many things if they get access to your computer, including causing it to crash, infecting it with viruses, stealing data, and even wiping out your whole hard drive. One effective way to deal with hackers is by using a firewall. There are two types of firewalls, software and hardware. Both work by monitoring incoming and outgoing traffic and filtering out unwanted connections and data. Since it prevents unwanted connections, it helps prevent hackers from accessing data from your computer. To increase security on your computer, you should also install antivirus software to prevent viruses, worms, and trojans from infecting your computer. Viruses infect files, replicates, and then spread themselves around to other files and computers. They usually are programmed to slow down your computer, by using up memory. This sometimes even causes your computer to crash, causing you to lose unsaved data. Worms are similar to viruses, but cannot spread themselves to other programs and files. Trojans don't replicate and spread, but can be very harmful by enabling hackers and viruses to enter your computer. So it is useful to have a firewall and install antivirus software to protect yourself from these online threats.
Example of Internet Security Software
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