2. INTRODUCTION
• ISO
International
Standard
Organization
Established in 1947 Multinational body dedicated
to worldwide agreement Standard of international
level Covers all aspects of network
communications
• It is Open System Interconnection MODEL
Allow two different Machines to connect without
change
in
hardware
and
software
It is model for understanding and designing a
network architecture
4. Why we need OSI Model
• To allow different types of network hardware
and software to communicate with each other
• Avoidable duplication of equipment resources
• To breaks network communication into
smaller, simpler parts that are easy to develop
• To facilitates standardization of network
components to allow multiple – vendor
development and support