TABLE OF CONTENT PG
INTRODUCTION 2
THE CONCEPT 2
EXPLANATION OF EACH LAYER 3
THE IMPORTANCE OF EACH LAYER 4-5
CONCLUSION 5
REFERNCES 6

INTRODUCTION
The open system interconnection model, better known as the OSI model. The OSI model is not a protocol, but a reference model or an abstract structure that describes the functions and interactions of various data communication protocols. But instead of serving as a model with protocols that would be used worldwide, the OSI model has become a teaching tool that shows how different tasks within a network should be handled in order to promote error-free data transmission and provides a conceptual structure that helps us computer-computer communication over a network and compare network functions. (Andrew, 2013)
This review is regarding the journal article “Understanding The OSI 7-Layer” by Neil Briscoe, the author of this article, is a networking consultant and Cisco guru.This review is summarize the jounral acticle. Explain and analyze the characteristic of OSI 7-layer.

THE CONCEPT
This article is show that OSI model have 7-layer: : Layer 1- Physical, Layer 2- Data Link, Layer 3- Network, Layer 4- Transport, Layer 5- Session, Layer 6- Presentation, and Layer 7- Application. At each layer, protocol perform services unique to that layer. The protocol also interact with protocol in the layer directly above and below, also responsible for a particular aspect of data communication. The OSI model also provides a guide for troubleshooting network problems by tracking them down to a specific layer.

EXPLANATION OF EACH LAYER The