Which two statements about the purpose of the OSI model are accurate? (Choose two.)
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A. B. C. D.AB.
The Open Systems Interconnection (OSI) model is a conceptual model that provides a framework for understanding how data flows throughout a network. It is a layered model, where each layer is responsible for a specific set of functions that support the communication between devices. The OSI model consists of seven layers, each with a unique function and set of protocols.
Here are the explanations for the two accurate statements about the purpose of the OSI model:
B. Facilitates an understanding of how information travels throughout a network: The OSI model provides a logical framework for understanding how data travels throughout a network. It breaks down the communication process into smaller, more manageable parts, which makes it easier to troubleshoot network issues. Each layer of the model has a specific function, and the layers work together to ensure that data is transmitted reliably and efficiently.
D. Ensures reliable data delivery through its layered approach: The layered approach of the OSI model ensures that data is transmitted reliably and efficiently. Each layer has a specific function, and the layers work together to ensure that data is delivered to its destination. For example, the Transport layer is responsible for ensuring that data is delivered reliably, while the Network layer is responsible for routing data to its destination.
A. Defines the network functions that occur at each layer: This statement is partially correct. The OSI model does define the functions that occur at each layer, but it is not the only model that does so. Other models, such as the TCP/IP model, also define the functions that occur at each layer.
C. Changes in one layer do not impact other layers: This statement is not accurate. Changes in one layer can impact other layers, especially if the change affects the way that data is transmitted or processed. For example, if a change is made to the Transport layer, it can affect the way that data is transmitted through the Network layer.