Computer and Internet Basics - PowerPoint PPT Presentation

Loading...

PPT – Computer and Internet Basics PowerPoint presentation | free to view - id: 3b6fd5-M2IxM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Computer and Internet Basics

Description:

Computer and Internet Basics Unit A What is a computer? A computer is a device for processing data. More precisely a computer is a device that accepts input ... – PowerPoint PPT presentation

Number of Views:459
Avg rating:3.0/5.0
Slides: 46
Provided by: euclidBa
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Computer and Internet Basics


1
Computer and Internet Basics
  • Unit A

2
What is a computer?
  • A computer is a device for processing data. More
    precisely a computer is a device that accepts
    input, processes data, stores data, and produces
    output, all according to a series of stored
    instructions.
  • A program is a set of instructions to perform a
    task.

3
A Computer is a device that
  • accepts input
  • processes data
  • stores data
  • produces output

(all according to a series of stored instructions)
4
Computer System
Peripherals
5
Computer System
6
Computer system consists of
  • Hardware includes the electronic and mechanical
    devices that process data. Examples
    microprocessor, key board.
  • Peripheral devices expand the computers input,
    output, and storage capabilities.
  • Examples Printers.
  • Software programs

7
Computer Network
  • A computer network consists of two or more
    computers and other devices that are connected
    for the purpose of sharing data and programs.

8
LAN
  • A LAN (local Area network) is a computer network
    that is located within a limited geographical
    area, such as a building or campus.

9
COMPUTER FUNCTIONS
  • Computer Input is whatever is put into a computer
    system.
  • Input can be supplied by a person, by the
    environment, or by another computer.
  • Data refers to the symbols that represent facts,
    objects, and ideas.

10
COMPUTER FUNCTIONS
  • Computer manipulate data in many ways, and we
    call this manipulation processing

11
COMPUTER FUNCTIONS
  • The instructions that tell a computer how to
    carry out the processing tasks are referred to as
    a computer program.
  • In a computer most processing takes place in the
    central processing unit (CPU) (also known as
    microprocessor)
  • A computer stores data so that it will be
    available for processing.
  • Memory is an area of a computer that temporarily
    holds data waiting to be processed, stored, or
    output.
  • Storage is the area of a computer that holds data
    on a permanent basis when it is not immediately
    needed for processing.

12
Computer Functions
13
Categorizing Computers
Cost
Usage
Size
Capability
14
Less Powerful Computers
  • Videogame console
  • Sony PlayStation

15
Personal Computer
  • A PC is designed to meet the computing needs of a
    person. It typically provides access to a wide
    variety of computing applications, such word
    processing, photo editing, e-mail, etc.
  • There are four types desktop, notebook
    computers, workstations, and video game console.
  • Workstations are usually powerful desktop
    computers for special purposes.

16
Servers
  • The purpose of a server is to serve the computers
    on a network by supplying them with data.
  • A PC, workstation, mainframe or supercomputer can
    work as a server.

17
Mainframes
  • A mainframe is a large and expensive computer
    capable of simultaneously processing data for
    hundreds or thousands of users.
  • Mainframes are used by businesses, universities,
    or governments to provide centralize storage,
    processing and management of large amount of data.

18
Supercomputers
  • A computer is a supercomputer if, at the time of
    construction, it is one of the fastest computers
    in the world.
  • Supercomputers are used in complex tasks such as
    breaking codes or climate modeling.
  • The CPU of a supercomputer contains thousands of
    microprocessors.
  • http//www.top500.org

19
Computer System
Peripherals
20
System Unit
  • The system unit is the case that holds the power
    supply, storage devices, and the circuit boards,
    including the main circuit board (also called the
    mother board), which contains the
    microprocessor.

21
System Unit
Power Supply
Storage Devices
Circuit Boards
22
Input/Output Devices
  • Monitor
  • Keyboard
  • Mouse
  • Modem
  • Printer
  • Speakers/sound card

23
Notes
  • You can use a modem to establish an Internet
    connection using an standard telephone line.
  • Computers have many types of storage devices that
    are used to store data when the power is turned
    off.

24
Storage Devices
  • Floppy disk drive
  • Hard disk drive
  • CD-ROM drive
  • DVD drive
  • CD writer

25
Storage Devices
  • A floppy disk drive is a storage device that
    reads data from and writes data to a floppy
    disks.
  • A hard disk drive can store billions of
    characters of data.
  • A CD-ROM drive is a storage device that uses that
    uses laser technology to read data that is
    permanently stored on data or audio CDs.
  • A DVD drive can read data from CDs DVDs, or DVD
    movie discs.

26
Data vs. Information
Data (symbols) used by computers
27
Data
  • Computers process and store data using the
    binary number system and several other codes
    designed expressly for electronic data.
  • Binary number system has only two digits 0 and
    1.
  • Each 0 and 1 is a Bit.
  • Byte (8 bits)

28
Files
  • Collection of data on a storage medium
  • Data file (passive)
  • Executable file (active)
  • Filename and extension

Resume.doc
Word.exe
Image.jpg
29
Software
  • Application Software is a set of computer
    programs that helps a person carry out a task.
  • System Software is a set of computer programs
    that helps a computer carry out basic tasks.

30
System Software
  • Helps the computer monitor itself in order to
    function efficiently
  • Operating system
  • Master controller of all computer activities
  • Popular operating systems
  • PCs Microsoft Windows, Mac OS
  • Handhelds Windows CE and Palm OS
  • Servers Linux and UNIX

31
  • Computers that operate in essentially the same
    way are said to be compatible.
  • Two of the most important factors that influence
    the compatibility of two computers are the
    microprocessor and the operating system.
  • A platform consists of the underlying hardware
    and software of the computer system.

32
Platform
Microprocessor Operating system
  • Mac and PC compatibility is an issue
  • Apple computer Mac platform
  • Original IBM computer Windows or PC platform

33
Application Software
Designed to carry out a particular task
34
Internet Basics (Cyberspace)
  • Internet is a collection of local, regional,
    national and international computer networks that
    are linked together to exchange data and
    distribute processing tasks.

35
Internet Terminology
  • The Internet backbone defines main Internet
    routes
  • route telecommunication link
  • Constructed and maintained by major
    telecommunications companies.
  • TCP/IP is a standard set of rules for
    electronically addressing and transmitting data.
  • Transmission Control Protocol/ Internet Protocol

36
Internet Backbone
37
Internet Terminology
  • IP Address unique number for each Internet
    computer
  • Packets small chunks of data ready to travel the
    Internet
  • Router helps send along the packets to correct
    destination

38
Internet Resources
Internet Telephony
Usenet
E-commerce
Instant Messaging
Web Sites
E-mail
Internet Radio
Download Or Upload
Chat Groups
39
Modem Internet Connections
  • Dial-up connection via modem requires a modem,
    which converts your computers digital signals
    into a type of signal that can travel over phone
    lines.
  • The maximum speed is 56Kbps, or 56,000 bits per
    second.
  • E-mail, E-commerce, and chat.

40
Faster Internet Connections
  • ISDN (Integrated Services Digital Network)
    provides data transfer speeds of either 64K or
    128K.
  • Always-on and expensive
  • DSL (Digital Subscriber Line) is a generic name
    for a family of high speed Internet links,
    including ADSL, SDSL, and DSL lite.
  • Up to 125 times faster than dialup
  • Both ISDN and DSL connections require proximity
    to a telephone switching station.

41
Internet Service Provider (ISP)
  • An ISP is a company that maintains Internet
    computers and telecommunications equipment in
    order to provide Internet access to businesses,
    organizations and individuals
  • User ID and password required
  • Email account monthly fee
  • Should have local access telephone numbers

42
World Wide Web Basics
  • The web (or World Wide Web) is a collection of
    files that are interconnected through of
    hypertext.
  • Hypertext text, video, pictures.
  • A Web pages is a collection of hypertext
    documents and links (or hyperlinks).
  • A link is a related document.
  • A web site is a collection of web pages with an
    Internet address.
  • A Web server is a computer that stores and
    distributes web pages.

43
World Wide Web Basics
  • URL (uniform resource locator) is the internet
    address of a web site.
  • HTTP ( Hypertext Transfer Protocol) is the
    communications standard that is used to transport
    web documents over the Internet.
  • HTML (Hypertext Markup Language) is a language to
    create web pages.
  • .htm or .html file extension

44
Browsers and Search Engines
  • A browser is a software program that runs on
    your computer and helps you access web page.
  • A search engine refers to a web site that
    provides a variety of tools to help you find
    information on the Web.

Microsoft Internet Explorer and Netscape
Navigator
45
Computer and Internet Basics
  • End
About PowerShow.com