O'Reilly logo

Implementing Cisco Networking Solutions by Harpreet Singh

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Basic OSI reference model

The communication entities perform a variety of different functions during the communication process. These functions range from creating a message, formatting the message, adding information that can help detect errors during transmission, sending the data on the physical medium, and so on.

The OSI reference model defines a layered model for interconnecting systems, with seven layers. The layered approach allows the model to group similar functions within a single layer, and provides standard interfaces allowing the various layers to talk to each other.

Figure 1 shows the seven layers of the OSI model. It is important to note that the reference model defines only the functions of each layer, and the interfaces with ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required