1 introducing networks
TRANSCRIPT
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Introducing Networksand the Internet
Mrs. WilsonRocky Point High School
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Desktop Computing
•HARDWARE: Physical Components
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Input/OutputDevices
• Data and instructions are entered into a computer using input devices.– Can you name any?
• Processed data is conveyed using output devices.
– Can you name any?
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Examples of Input Devices
• Keyboard• Mouse• Scanner • Microphone• Digital Camera• CD-RW/DVD drive
• Disk Drive
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Examples of Output Devices
• Monitors• Printers• CD-RWs• Disk Drives• Memory Keys• Speakers
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Peripheral Devices
• In computing, any item connected to a computer’s central processing unit (CPU) through a port. – Ports can be USB, Bluetooth, FireWire, parallel and
serial.
• Typical peripherals include keyboard, mouse, monitor, and printer.
• Users who enjoy playing games might add a joystick or a trackball.
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Hardware & Software
• Hardware– Physical components– You can “touch” them
• Software– You cannot “touch” it– Comes on CD ROMs
– Can be downloaded– Can be developed– Operating/Application
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CPU—Central Processing Unit
• The CPU (Central Processing Unit) or processor processes data and controls the flow of data between the computer’s other units.
• Manufacturers– Intel
– AMD
• Processors are identified by a model name or number, such as Pentium® 4, Itanium® 2, and Opteron™. The Intel Pentium 4 (P4) CPU has a clock rate of 3.06 GHz.
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Memory… Try to Remember!
• Memory in the form of integrated circuits (ICs) store data electronically.
• ROM (Read Only Memory) contains the most basic operating instructions for the computer. The data in ROM is a permanent part of the computer and cannot be changed.
• RAM (Random Access Memory), also called primary or main memory, is memory where data and instructions are stored temporarily.
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Real-Time Clock
• A battery chip called a real-time clock keeps track of the date and time in a computer EVEN when the computer is off.
• When the first true personal computer, the Apple II, was introduced in 1978, the state of the art did not include computers having clocks.
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Software & Programs
• Operating system software is run automatically when the computer is turned on and enables the user to communicate with the computer with input devices, such as the mouse and keyboard.
• Applications software is written by programmers to perform a specific task, such as a word processor.
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Mobile Computing (Page 3)
• Improved technology
• Computers come in all sizes and shapes
– Notebooks– Tablets
– Handhelds– Smart Phones– “Wearables”
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Bluetooth• Bluetooth is a wireless technology used to allow mobile
computing devices to communicate.
• It is used for short-range connections between desktop and laptop computers, PDAs (like the Palm Pilot or Handspring Visor), digital cameras, scanners, cellular phones, and printers.
• The technology is based on radio waves, there can be objects or even walls placed between the communicating devices and the connection won't be disrupted.
• Also, Bluetooth uses a standard 2.4 GHz frequency so that all Bluetooth-enabled devices will be compatible with each other.
• The only drawback of Bluetooth is that, because of its high frequency, its range is limited to 30 feet.
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Cross-Platform Connectivity
• The ability for one type of PC to link to and share data with a different type of PC.
• Notebook and desktop PCs typically have good cross-platform connectivity.
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Terms to Know
• Bluetooth• Handheld Computers• Mobile Computing• Software• Hardware
• Scanner
• Printer• Peripheral• CPU• Ports• Processors
• Real-time Clock