Cisco CCNA Exam Tutorial: Mapping The OSI Model To The TCPIP Model

The OSI model is the model that most networking personnel are familiar with, but to earn your CCNA, you want to know the OSI model, the TCP/IP model, and how the two map to each other.

The 4 layers of the TCP/IP architecture can be compared to specific levels of the OSI model. It’s critical to know what every single level of the TCP/IP protocol architecture does, and how these layers map to the OSI model.

The Application Layer of the TCP/IP model performs considerably the very same tasks as the Application, Presentation, and Session layers of the OSI model.

The Transport layer in the TCP/IP architecture is comparable to the Transport layer in the OSI model. This layer can use TCP or UDP as properly.

The Internetwork layer in the TCP/IP architecture utilizes IP addresses to determine how packets need to be routed. Keep in mind that the OSI model makes use of IP addresses, or “Layer 3 Addresses”, at the Network layer. The two layers do much the identical factor. This layer is also referred to in the TCP/IP model as the Internet layer.

The Network Interface layer in the TCP/IP architecture serves to define the protocols and the hardware needed to actually deliver the data across the network. The Network Interface model does the operate of both the Data Link and Physical Layers in the OSI model.

Keeping all this straight can be really confusing when you initial commence your CCNA research. Concentrate on the OSI model in your studies, but make sure you know how the TCP/IP model maps to that model and you’ll be prepared for CCNA exam accomplishment!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of over 100 totally free certification exam tutorials, like Cisco CCNA certification test prep articles. His exclusive Cisco CCNA study guide and Cisco CCNA coaching is also obtainable!