CCNA INTRO Exam Certification Guide by Wendell Odom

By Wendell Odom

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Quiz 10. 19 Which of the following terms is used specifically to identify the entity that is created when encapsulating data inside data-link headers and trailers? a. Data b. Chunk c. Segment d. Frame e. packet f. ” The suggested choices for your next step are as follows: ■ 8 or less overall score—Read the entire chapter. This includes the “Foundation Topics” and “Foundation Summary” sections and the Q&A section. ■ 9 or 10 overall score—If you want more review on these topics, skip to the “Foundation Summary” section and then go to the Q&A section.

Probably not. However, you will often use terms relating to OSI. Also, the INTRO exam covers the basics of OSI, so this chapter also covers OSI to prepare you for questions about it on the exam. The TCP/IP Protocol Architecture TCP/IP defines a large collection of protocols that allow computers to communicate. TCP/IP defines the details of each of these protocols inside document called Requests For Comments (RFCs). By implementing the required protocols defined in TCP/IP RFCs, a computer can be relatively confident that it can communicate with other computers that also implement TCP/IP.

Book Page 26 Wednesday, July 2, 2003 3:53 PM 26 Chapter 2: The TCP/IP and OSI Networking Models All the examples describing the application and transport layers ignored many details relating to the physical network. The application and transport layers purposefully were defined to work the same, way whether the endpoint host computers were on the same LAN or were separated by the Internet. The lower two layers of TCP/IP, the internetwork layer and the network interface layer, must understand the underlying physical network because they define the protocols used to deliver the data from one host to another.

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