IS Fall 2009 Chapter 3 9/2/2009

Epidemics and Health H1N1 – Younger are more at risk – Easily spread in crowds (like classes) Two of your lowest quizzes will be dropped – There should be at least one per week Tests can be made up 8/17/20092IS 2101/01---Fall 2009

LOOKING AT THE PARTS 8/17/2009IS 2101/01---Fall 20093

Communication A port is a physical connector used by the computer to communicate with other devices Parallel Serial – USB Network – Ethernet 8/17/20094IS 2101/01---Fall 2009

Communication Some communication is not over physical wires or cables Wireless ethernet Bluetooth Infrared 8/17/20095IS 2101/01---Fall 2009

Expansion Cards Generally used to provide connections to external devices Graphics cards for connecting to monitors Network cards 8/17/20096IS 2101/01---Fall 2009

Software Application software System software – Firmware – Operating system – Utilities 8/17/20097IS 2101/01---Fall 2009

Operating Systems Provides the foundation for all other software Application Programmer’s Interface User interface to control the system – GUI – Command line 8/17/20098IS 2101/01---Fall 2009

Different OS’s Different hardware Different services and resources provided Some are free 8/17/20099IS 2101/01---Fall 2009

Common OS’s Microsoft Windows – Intel type CPU’s OS/X – Macintosh Linux – Numerous processors supported – Many free versions 8/17/200910IS 2101/01---Fall 2009

Some Utilities Disk Defragmenter Task manager Task scheduler --- cron Backup Communication – SSH secure shell – SFTP secure file transfer protocol 8/17/200911IS 2101/01---Fall 2009

Some Applications Productivity software Entertainment software Development software 8/17/200912IS 2101/01---Fall 2009

Some Productivity Software Spreadsheet Word processing Database Presentation Communication ( ) Image manipulation 8/17/200913IS 2101/01---Fall 2009

Image Manipulation Simple editing – Cropping – Rotating – Filtering More complex – Overlays – Complex filters 8/17/200914IS 2101/01---Fall 2009

Free Software Open Office – Word processing, spreadsheet, database, presentation – Can use Microsoft Office formats Irfanview – Basic image editing tool GIMP – Complex image editing tool 8/17/200915IS 2101/01---Fall 2009

Networks Extent – Local area – Wide area – Internet: a confederation of local area networks Topology – Bus: shared communication line – Others: star, ring 8/17/200916IS 2101/01---Fall 2009

Safe Practices Maintenance – Backups – Updates Malware – Viruses – Spyware Hacking – Firewalls 8/17/200917IS 2101/01---Fall 2009

Start here 9/7 8/17/200918IS 2101/01---Fall 2009

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 8/17/200919IS 2101/01---Fall 2009

Getting an Antivirus Download Software (link on left) Log in using netid 8/17/200920IS 2101/01---Fall 2009

How do Virus Checkers Work? Look for patterns in files Check as new content is introduced to the system – Downloads – Check if certain important files have changed 8/17/200921IS 2101/01---Fall 2009

Ergonomics Figure 37 on page 135 Wrist support on keyboard – And mouse Monitor at eye level or below Legs at comfortable angle 8/17/200922IS 2101/01---Fall 2009