Module 3

• OSI Model


  A conceptual framework developed by the International Standards Organization (ISO) to standardize network communications
• OSI Model established


  Late 1970s
• Layers of the OSI Model


  • Physical
  • Data Link
  • Network
  • Transport
  • Session
  • Presentation
  • Application
• OSI Model


  • Consists of seven layers, each with specific functions, facilitating end-to-end communication between different systems
  • Provides a structured approach to designing, troubleshooting, and maintaining network systems
• TCP/IP Protocol Suite


  The foundation of modern networking, powering communication across the Internet and other networks
• Layers of the TCP/IP Protocol Suite


  • Application
  • Transport
  • Internet
  • Link
• TCP/IP Protocol Suite


  • Provides a hierarchical structure with interactive modules, offering flexibility and scalability in network design and implementation
  • Key protocols include TCP, UDP, and IP, each serving specific functions in data transmission and routing
  • Modular architecture and robust protocols contribute to its widespread adoption and use in diverse networking environments
• The OSI Model is a conceptual framework, while the TCP/IP Protocol Suite is a practical protocol suite developed prior to the OSI Model