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Networking Slides

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Transcript

  • 1. Networks Mr Arthur
  • 2. Aims of Lesson 1
    • What is a Stand Alone Computer System?
    • What is a Network?
    • Local Area Networks
    • Wide Area Networks
  • 3. Stand Alone/Networked
    • A Stand Alone computer system is a computer that is not connected to any other
    • A network is a linked set of computer systems that are capable of sharing programs, data and sending messages
  • 4. Local Area Networks
    • A LAN is a network of computers connected over a small geographical area, usually inside the 1 building
    • Examples
      • School LAN
      • LAN in your house
    • Uses
      • Sharing printers
      • Sharing files and data.
    • Transmission Media
      • Copper wire, fibre optic, wireless
  • 5. Wide Area Networks
    • A WAN is a network of computers over a large geographical area, such as across a country or the world.
    • Examples
      • The Internet
      • Companies like the BBC communicating across the world
    • Uses
      • Video-conferencing, use of e-mail, live chat
      • Multi-user databases
      • E-commerce and entertainment
    • Transmission Media
      • Fibre Optic, Microwave transmission, Satellite links
  • 6. Advantages of Networks
    • You can share hardware therefore saving money
    • They allow you to communicate with people via email, video conferencing etc
    • You can buy and sell goods online
    • You can share anti virus software
    • You can log on to lots of different stations and still access your own documents
  • 7. Aims of Lesson 2
    • Last Lesson
    • What is a Stand Alone Computer System?
    • What is a Network?
    • Local Area Networks
    • Wide Area Networks
    • Transmission Media for LANs and WANs
    • Today’s Lesson
    • Network Security
    • Client/Server Networks
    • Network Interface Cards
    • Freeware/Shareware
  • 8. Network Security
    • Passwords = Users have passwords to keep their data secure and prevent unwanted tampering with data
    • Encryption = putting data into a code to prevent it being intercepted, for example your bank details
    • Physical Methods
        • Door lock
        • Finger print reader
        • Number keypad
        • Others?
  • 9. Client/Server Networks
    • Client/Server Networks
      • Where there are many clients that access files stored on servers
    • Network Interface card
      • A NIC is fitted inside a computer system to allow it to communicate with a computer network
    • Freeware
      • This is software you get for free and there are no restrictions on copying etc, i.e ITunes
    • Shareware
      • This is software you get a 30 day trial for and then have to pay for it
  • 10. Networks = What you need to know!
    • What is a Stand Alone Computer System?
    • What is a Network?
    • Local Area Networks
    • Wide Area Networks
    • Transmission Media for LANs and WANs
    • LANs = Copper wire/Fibre Optic/Wireless
    • WANs = Microwave/Fibre Optic/Satellite
    • Advantages of LANs?
      • Share hardware
      • Share files
      • Send emails
    • Network Security
      • Passwords
      • Encryption
      • Physical Methods?
    • Client/Server Network
    • Network Interface Card
  • 11. Network Powerpoint
    • Slide 1 = Covering Slide
    • Slide 2 = Standalone/Network definitition
    • Slide 3 = LANs / Examples and Transmission Media
    • Slide 4 = WANs / Examples and Transmission Media
    • Slide 5 = Advantages of Networks
    • Slide 6 = Network Security
    • Slide 7 = Client/Server and Network Interface Card

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