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31 Days Before Your CCENT Certification by Scott Bennett

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Day 30: Layered Model Applications

The benefits of a layered model are as follows:

• It helps with the design of protocols, because each layer has a standard function and a standard interface for communication with other layers.

• It allows products from different vendors to work together, allowing for collaboration in design and competition between manufacturers of compatible components.

• It allows the technology of one layer to improve without affecting other layers.

• It provides common terminology to teach, learn, and discuss networks and network protocols.

Table 1-2 compares the OSI seven-layer model and the TCP/IP model.

Table 1-2. OSI Seven-Layer Model and TCP/IP Model

Layer 2 of the OSI model, the data link layer, is made up of two ...

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