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IS 2101---Fall 2009

IS 2101---Fall 2009. Chapter 3 9/9/2009. Looking at the Parts. Malware. How do you get it? Generally, executing a program These programs can be packaged many ways How can you tell? Misbehaving system Anti-virus tools Someone else notices. Getting an Antivirus.

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IS 2101---Fall 2009

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  1. IS 2101---Fall 2009 Chapter 3 9/9/2009

  2. Looking at the Parts IS 2101/01---Fall 2009

  3. Malware • How do you get it? • Generally, executing a program • These programs can be packaged many ways • How can you tell? • Misbehaving system • Anti-virus tools • Someone else notices IS 2101/01---Fall 2009

  4. Getting an Antivirus • http://its.kennesaw.edu/students.htm • Download Software (link on left) • Log in using netid IS 2101/01---Fall 2009

  5. How do Virus Checkers Work? • Look for patterns in files • Check as new content is introduced to the system • Downloads • E-mail • Check if certain important files have changed IS 2101/01---Fall 2009

  6. Ergonomics • Figure 37 on page 135 • Wrist support on keyboard • And mouse • Monitor at eye level or below • Legs at comfortable angle IS 2101/01---Fall 2009

  7. Mainframe Disk Drives • http://en.wikipedia.org/wiki/Early_IBM_disk_storage#IBM_350 • The IBM 350 • 7 Meg of storage IS 2101/01---Fall 2009

  8. Chapter 4 Understanding and Assessing Hardware IS 2101/01---Fall 2009

  9. Goal • Evaluating your current system • Does it do what you need? • Do you need to upgrade? • Modify an existing system • Getting a new system IS 2101/01---Fall 2009

  10. Is it The Computer or Me? IS 2101/01---Fall 2009

  11. The Ideal Computer IS 2101/01---Fall 2009

  12. Training on Campus • ITS offers free training courses IS 2101/01---Fall 2009

  13. Evaluating Your System IS 2101/01---Fall 2009

  14. Evaluation Inventory • P. 154 in the text • Assessment categories • Portability • Entertainment uses • Educational uses • Business uses IS 2101/01---Fall 2009

  15. Portability • Take it with you? • Access wireless? IS 2101/01---Fall 2009

  16. Entertainment Uses • Internet and e-mail? • Play CD’s and DVD’s • Burn CD’s and DVD’s • Produce videos • Record and edit music • Edit photos • Transfer photos from camera to computer IS 2101/01---Fall 2009

  17. More Entertainment • Graphics intensive games • Connect many peripheral devices at once • Purchase videos and music over the internet IS 2101/01---Fall 2009

  18. Educational Uses • Word processing • Other educational software • Create backups of files • Access library and other archives • Create presentations IS 2101/01---Fall 2009

  19. Business Uses • Spreadsheets and databases • Use multiple applications and integrate them • Online commerce, such as banking and paying bills • Job searches, post résumé IS 2101/01---Fall 2009

  20. Desktop or Notebook? IS 2101/01---Fall 2009

  21. The CPU • Performance • Clock speed • Cache size • Front side bus • Multi-core • Monitoring CPU usage with task manager IS 2101/01---Fall 2009

  22. Evaluating RAM • Faster but more expensive • So, less of it than secondary storage • Memory modules are on the motherboard • Types of RAM • Physical configuration • Operation • Speed IS 2101/01---Fall 2009

  23. How Much RAM Installed? • My Computer • Task Manager, Performance • Kernel memory IS 2101/01---Fall 2009

  24. What Uses RAM? • Microsoft Vista about 512 MB • Microsoft Office about 256 MB • IE 7 about 128 MB • iTunes about 256 MB • Check Task Manager process list IS 2101/01---Fall 2009

  25. Virtual Memory • If the contents of a part of RAM are not needed at the moment, the data can be written to secondary storage • Paging moves data back and forth between secondary storage and RAM • If there is too little RAM, the paging can take more time than the actual useful work • Thrashing IS 2101/01---Fall 2009

  26. Adding RAM • Determining the physical configuration • How many slots • How many slots are in use • What kind of memory needed? • Restrictions on the size of new modules • May have to be installed in pairs IS 2101/01---Fall 2009

  27. Secondary Storage • Space used for software • OS • Programs • Space used for data • Music and videos especially • Speed and capacity IS 2101/01---Fall 2009

  28. Increasing Secondary Storage • Adding a drive • Many desktops have space for a second disk drive • Install drive, hook up, configure • Replacing a drive • Usually means reinstalling all software, including the OS • Data must be backed up and transferred IS 2101/01---Fall 2009

  29. CD’s and DVD’s • Reading • Writing • Speed IS 2101/01---Fall 2009

  30. External Storage • Flash drive • Usually uses USB port • Very portable, rugged • Disk drive • Usually uses USB port • Often powered through the USB • So drains the laptop battery • Higher capacity IS 2101/01---Fall 2009

  31. Video Interface Card • Memory • Resolution and colors • Processing features • Rendering • Texturing IS 2101/01---Fall 2009

  32. Sound • Speakers • Sound card IS 2101/01---Fall 2009

  33. Ports • USB and Ethernet are very common • FireWire • SD cards • Serial and parallel not common, but not needed as much • Telephone line to modem IS 2101/01---Fall 2009

  34. Start here 9/14 IS 2101/01---Fall 2009

  35. Extra Ports and Hubs • It may be possible on a desktop to add ports using expansion cards • Hubs can be used to multiply USB ports IS 2101/01---Fall 2009

  36. System Reliability • What you can do for your system • Why does it crash? • What about software? • Updates IS 2101/01---Fall 2009

  37. What You Can Do • Clean out the startup folder • Clear out unnecessary files • Antivirus, antispyware, antiadware • Disk defragmenter IS 2101/01---Fall 2009

  38. Problem Software? • Some software makes great demands on the system • Games are especially a problem • Newer versions of software often need more resources than older versions IS 2101/01---Fall 2009

  39. Updates • Automatic updates • Complex software usually needs to be patched on occasions • Most operating systems have a system to automatically keep track of these changes • Microsoft update facility IS 2101/01---Fall 2009

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