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The Benefit of Using a Layered Model

To visualize the interaction between various protocols, it is common to use a layered model. A layered model depicts the operation of the protocols occurring within each layer, as well as the interaction with the layers above and below it.

There are benefits to using a layered model to describe network protocols and operations. Using a layered model:
  • Assists in protocol design, because protocols that operate at a specific layer have defined information that they act upon and a defined interface to the layers above and below.
  • Fosters competition because products from different vendors can work together.
  • Prevents technology or capability changes in one layer from affecting other layers above and below.
  • Provides a common language to describe networking functions and capabilities.
Diagram below OSI and TCP/IP Layered model

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