Why ISO/OSI Model?


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
    • 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


Recommended Study Material
Learn on the go.
The app designed for the modern cyber security professional.
Get it on Google PlayGet it on the App Store
Practice Labs and Exam Vouchers

Congratulations! You're taking the first step to getting certified. Get some hands on experience with available practice labs OR save some money, support Cybrary, and purchase discounted exam vouchers. Ready to earn your next industry certification? Join cyber security's largest community and start learning today.


Our Revolution

We believe Cyber Security training should be free, for everyone, FOREVER. Everyone, everywhere, deserves the OPPORTUNITY to learn, begin and grow a career in this fascinating field. Therefore, Cybrary is a free community where people, companies and training come together to give everyone the ability to collaborate in an open source way that is revolutionizing the cyber security educational experience.

Cybrary On The Go

Get the Cybrary app for Android for online and offline viewing of our lessons.

Get it on Google Play

Support Cybrary

Donate Here to Get This Month's Donor Badge

Skip to toolbar

We recommend always using caution when following any link

Are you sure you want to continue?