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Computer networks

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Computer networks,IP address and layered architecture notes

Publicada em: Tecnologia, Educação
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Computer networks

  1. 1. Mahesh Kodituwakku
  2. 2. Every computer or devices on the internet has unique number assigned on it called an IP Address.
  3. 3. Network Host
  4. 4. Class Range Class A 1-126 Class B 128-191 Class C 192-223 Class D 224-239 Multicasting Class E 240-255 Experiment
  5. 5. A public IP Address is any valid address, or number, that can be accessed over the internet.
  6. 6. A private IP Address is any number or address assigned to the device on a private TCP/IP Local Area Network that is accessible only within the LAN. Private IP
  7. 7. OSI 7 Layer Five layer architecture and the 4 layer TCP/IP are the most popular network architectures. 5 layer architecture is a model that represents how layered architecture is working.
  8. 8.  To reduce the complexity of data network design, implementation and maintenance to manageable size, most networks use a layered architecture
  9. 9.  Is there a limitation of using layers.?  There is no natural law or scientific principal that would dictate an exact number of layers.
  10. 10. Layered Network Architecture Layer 4/5 interface Layer 3/4 interface Layer 2/3 interface Layer 1/2 interface Layer 5 Layer 4 Layer 3 Layer 2 Layer 1 Host 1 Host 2 Layer 5 Layer 4 Layer 3 Layer 2 Layer 1 Physical Transmission Medium Layer 1 Protocol Layer 2 Protocol Layer 3 Protocol Layer 4 Protocol Layer 5 Protocol
  11. 11. Freeze Interface
  12. 12. Information Flow and Protocol Hierarchy Source machine Destination machine M M MH4MH4 M1H4H3 M1H4H3M2H3 M2H3 H2 T2M1H4H3H2 T2M1H4H3 H2 T2M2H3 H2 T2M2H3 Layer 5 protocol Layer 3 protocol Layer 2 protocol Layer 4 protocol Layer 1 protocol
  13. 13. 5 LAYER Vs OSI 7 LAYER
  14. 14. 5 Layer Architecture Model OSI 7 Layer Architecture Layers are name with layer numbers Eg:-Layer1,Layer2… Layers are name with name according to its functions No data communication Standards Many Standards in OSI Only add Headers in each layers passing Data Add headers and divided in to packets
  15. 15. Not using protocols Use many protocol No separate functions like OSI Each layer has different functions No end users in layer architecture End users in 7 layer OSI Never discuss capitulation ,De- capitulation, Fragmentation and De- Fragmentation Each layer has capitulation ,De- capitulation, Fragmentation and De- Fragmentation…… It is only a model OSI is a working model that develop using 5 layer model

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