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OSI MODEL
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OSI MODEL

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Transcript

  • 1. Protocol is the law in networking worldNetwork devicesoNIC (network interface card)oRouteroSwitchoBridgeo ...........etcNetwork companies (microsoft_ junipr _redhat _cisco)
  • 2. Network Devices NICHub Switch Router Bridge
  • 3. Networking Companies
  • 4. (OSI)MODELOpen Systems Interconnect
  • 5. • A Model of How Protocols and Networking components could be made.• “Open” means ;can be used by anyone.• (OSI) Model is 7 layers.• OSI layers is logic.
  • 6. Breaks down the complex.Study complex system.Developing system.Helps in troubleshooting.Each layer has aspecific funcition
  • 7. • Application .All• Presention .People• Session .Seem• Transport .To• Network .Need• Data link .Data• Physical .Processing
  • 8. Microsoft & RedhatCisco & Juniper
  • 9. • Interface Application• Exampleso HTTP: browsing protocol.o FTP: file transfer protocol.o SMTP: simple mail transfer protocol.
  • 10. • Format of data .• Compression and Decompression of data .• Encryption and Decryption of data.
  • 11. • Set sessions between applications example : msn messenger• Specifies communication mode (simplex – half duplex – full duplex)• Data stream :010010101010101010101010011110001010100
  • 12. • Tasks : - Flow control - Error recovery• Protocols : -TCP -UDP• Segments segment1 TCP segment2 TCP
  • 13. • Tasks : -Best way to move data - Routing - IP addressing• Packets IP segment1 TCP
  • 14. oLLC: Frame network layer.oLLC: Network layer protocol. Data LinkoMAC: Address the frame. Logical Link Media Access Control ControloMac: Make H & T .oSwitch.oFrames Header IP segment1 TCP Tailer Addresses Error Detection
  • 15. Mac Address
  • 16. • Send & Receive Bits• Hub Header IP segment1 TCP Tailer 001010101010101010101010101010101010101010101010101000