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CCNA Certification All-In-One For Dummies by Silviu Angelescu

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Chapter 2: TCP/IP Layers and Protocols

Exam Objectives

Describing the purpose and function of each TCP/IP layer

Understanding data encapsulation

Identifying and explaining data flow through the OSI layers

Describing the purpose and basic operation of the protocols in the TCP/IP family

Describing common Ethernet wiring and cabling standards

Examining hardware addressing and bridge segmentation at the data link layer

Interpreting differences between routing and routed protocols

Identifying distance vector and link-state protocols

Determining TCP transport mechanisms

Describing the protocols used at the application layer for network and Internet communications

Differentiating between the OSI and TCP layered models

It is time to dig a little deeper into the TCP/IP family of protocols and reveal a little more of the OSI and DoD models. I break down each layer inside the OSI model and magnify its inner workings. Protocols that reside at each of these layers are discussed along with the rules and standards for transmitting, sending, and verifying data. Then, the TCP/IP model is compared to the OSI framework, providing required knowledge to pass the CCNA examination. While the CCNA exam will test your knowledge in both areas of the OSI model and the TCP/IP model, you should memorize each layer in each of the models and know all their functionalities. By the time you are done studying and are ready to take the exam, you should be dreaming in layers!

Information Exchange through the OSI ...

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