BTT1O Unit 1 Review.

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Presentation transcript:

BTT1O Unit 1 Review

The Computer System 4 parts Hardware Software Data User

Types of Hardware Processor (CPU) Memory (RAM) manages all devices and performs the actual processing of data Memory (RAM) holds data and program instructions as the CPU works with them Input and Output (I/O devices) Input: keyboard, mouse, microphone Output: monitor, speakers, printer Storage devices Hard drive, optical drives

Software Systems Software Application Software

Techniques for Using a Mouse Pointing Clicking Double Clicking Dragging Right Clicking

Alternative Input Devices Scanner Bar Code Reader Microphone Webcam

Monitors Cathode Ray Tube (CRT) Flat Panel (LCD)

Printers Impact Printers Dot Matrix Non-Impact Printers Inkjet Laser

The Functions of a Computer Input Storage Processing Output

The Four Tasks of a CPU Fetch Decode Execute Store Gathering code for an instruction Decode Interpreting the instruction to determine which functions are to be performed Execute Processing the instructions and sending them to their proper destinations Store Sending the results of the instructions to the proper memory location for retention

Storage Devices Hard drive (40 -200 GB) Floppy Disk (1.44 MB) CD-R (700 MB) DVD-R (4.7 GB) Blu-Ray (25 GB) Flash Drive/USB Drive (256 MB – 10 GB)

Windows

Networks Benefits Types LAN WAN Topography Linear Star

Security Hackers vs. Crackers Passwords Firewalls Encryption Biometrics