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

Course Modules