Video Description

ISO/OSI Model (7 Layers)- ISO: International Standardization Organization

  • OSI: Open System Interconnection

    • Primary archtectural model for networks
    • Developed in 1983
    • Group of concepts
    • Describes how devices send/receive data

      • Hop-to-hop
      • End-to-end

Benefits of ISO/OSI Layered Model- Divides the network communication process into layers to be easier to troubleshoot

  • Allows multiple-vendor development through standardization of network components
  • Various types of network hardware and software can communicate
  • Layer separation makes changes in one layer do not affect other layers
  • Layers can interact with each other

ISO/OSI Layers- Application

  • Network processes to applications
  • Presentation

    • Data representation
  • Session

    • Interhost communication
  • Transport

    • End-to-end connections
  • Network

    • Address to best path
  • Datalink

    • Access to media
  • Physical

    • Binary transmission

Network Protocols- NetBEUI

  • NetBIOS Extended User Interface
  • LAN Protocol
  • Limited performance
  • Almost obsolete
  • IPX/SPX

    • Standard
    • Supports WAN
    • Vendor oriented
    • Poor performance if used with other vendors
  • Apple Talk

    • Standard
    • Supports WAN
    • Vendor oriented
    • Poor performance if used with other vendors
  • TCP/IP

    • Standard
    • Supports WAN
    • Not vendor oriented
    • Most widely used over internet
    • Mapped to OSI 7 layers

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