1313CHAPTERKeeping It SafeUsing the Internet isn t an entirely (Web hosting unlimited bandwidth)
1313CHAPTERKeeping It SafeUsing the Internet isn t an entirely risk-free adven- ture. Sadly, there are people in the world who getperverse pleasure from ruining other peoples fun. TheInternet provides ample opportunity to do that. Threatson the Internet take many forms, from relatively harm- less, but irritating, spam(junk e-mail) to virusesandworms programs designed to do bad things and makecopies of themselves to boot. Contrary to popular belief and hard-sell TV commercials, a dial-up Internet account is no safer than a broadbandaccount. Millions of computers (including my own) areon, and online, 24 hours a day, seven days a week, yetnever victimized by any bad things online. And millionsof people with dial-up accounts get all the bad things. The difference has nothing to do with the type ofaccount you have or how fast your connection is. Theonly thing that can protect you is knowing what thethreats are and how to defend yourself against them. Viruses, Worms, and Trojan HorsesThe most widely know threat on the Internet is the com- puter virus. Computer viruses aren t like viruses thathumans and animals catch. Computer viruses are pro- grams written by human beings. What makes a virus dif- ferent from most other types of programs is that a virusis able to replicate itself. That is, a virus is a programthat can e-mail copies of itself to other peoples comput- ers (via the Internet). The virus might do other badthings as well, such as erase files from your hard disk, perform attacks on other computers without your know- ing it, or just play pranks on you. A wormis very similar to a virus in that it s a programdesigned to do bad things, and you don t want it onyour computer. A worm can also replicate itself. It just …In This ChapterViruses, worms, horsesHackers and crackersDealing with pop-up adsDealing with spam(junk e-mail) Fighting adware controlsKeeping XP up-to-…
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