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CHAPTER 9Fundamental SecurityObjectivesUpon completion of this chapter, you should be able to answer the following questions:■■■Why is security important?What are security threats?What are some security procedures?Key Terms■■What are the preventive maintenance techniquesfor security?What can be done to troubleshoot security?This chapter uses the following key terms. You can find the definitions in the Glossary.malicious threat page xxaccidental threat page xxvirus page xxworm page xxTrojan horse page xxvirus protection software page xxantivirus software page xxsecurity policy page xxweb security page xxActiveX page xxJava page xxJavaScript page xxadware page xxgrayware page xxmalware page xxspyware page xxsocial engineering page xxdenial of service (DoS) page xxping of death page xxe-mail bomb page xxdistributed DoS (DDoS) page xxspam page xxpopup page xxSYN flood page xxspoofing page xxreplay page xxDNS poisoning page xxcard key page xxbiometric page xxpassword protection page xxdata encryption page xxport protection page xxcontinues
2 IT Essentials: PC Harware and Software Companion Guidecontinueddata backup page xxfile system security page xxWired Equivalent Privacy (WEP) page xxWi-Fi Protected Access (WPA) page xxLightweight Extensible Authentication Protocol(LEAP) page xxWireless Transport Layer Security (WTLS)signature filepage xxpage xx
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iiiTrademark AcknowledgmentsAll ter
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vAbout the Technical ReviewersDavid
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ixIdentify the Names, Purposes, and
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CHAPTER 1Introduction to the Person
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Chapter 1: Introduction to the Pers
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CHAPTER 5Fundamental Operating Syst
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CHAPTER 7Fundamental Printers and S
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CHAPTER 13Advanced Laptops and Port
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CHAPTER 15Advanced NetworksObjectiv
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GlossaryThis glossary defines many
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ase station 3AppleTalk A protocol s
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CMOS battery 5bus topology A networ
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desktop computer 7crosstalk Interfe
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dynamic routing 9Domain Name System
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floppy data cable 11FFast Ethernet
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IEEE 802.11 13Hardware Compatibilit
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Internet service provider 15infrare
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media-handling options 17line of si
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network operating system 19multithr
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ping 21Page Description Language (P
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Regedit 23Printer Control Language
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three-claw part retriever 27surge s
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virtual memory 29Uninterruptible Po
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zero insertion force (ZIF) socket 3
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