Wide area network (WAN) Question:
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Explain Why should we care about the OSI Reference Model ?
What is the main purpose for creating this OSI model?
Why it is a layered model?


OSI refrence model proposed by ISO.
we care about OSI because
1. It filters all the network communication into the small and simple component.
2. It allows vendor development through the standard network components as well as various types of network hardware and software to communicate.
3 and the changes in one layer affecting to the another layer, so it does not hamper development.

Main purpose to create this model that it provides a framework to implement and developed the network components and internetworking scheme as well as all the vendors developed there produt under a single standard.

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