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Communication Principles

Contents

  1. Objectives
  2. Key Terms
  3. Introduction (5.0)
  4. Networking Protocols (5.1)
  5. Communication Standards (5.2)
  6. Network Communication Models (5.3)
  7. Communication Principles Summary (5.4)
  8. Check Your Understanding Questions

Chapter Description

This Companion Guide is the official supplemental textbook for the Networking Essentials course in the Cisco Networking Academy. This sample chapter covers the communication protocols for networks as well as network communication standards. You will also learn what the difference is between the OSI and TCP/IP models.

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Check Your Understanding Questions

Complete all the review questions listed here to test your understanding of the topics and concepts in this chapter. Appendix A, “Answers to ‘Check Your Understanding’ Questions,” lists the answers.

  1. What is the purpose of the OSI physical layer?

    1. To control access to media

    2. To transmit bits across the local media

    3. To perform error detection on received frames

    4. To exchange frames between nodes over physical network media

  2. Which statement is correct about network protocols?

    1. They define the type of hardware that is used and how it is mounted in racks.

    2. They define how messages are exchanged between the source and the destination.

    3. They all function in the network access layer of TCP/IP.

    4. They are required only for exchange of messages between devices on remote networks.

  3. What networking term describes a particular set of rules at one layer that governs communication at that layer?

    1. Duplex

    2. Encapsulation

    3. Error checking

    4. Protocol

  4. Which layer of the OSI model defines services to segment and reassemble data for individual communications between end devices?

    1. Application

    2. Presentation

    3. Session

    4. Transport

    5. Network

  5. What is the purpose of protocols in data communications?

    1. To specify the bandwidth of the channel or medium for each type of communication

    2. To specify the device operating systems that will support the communication

    3. To provide the rules required for a specific type of communication to occur

    4. To dictate the content of the message sent during communication

  6. Which term refers to a formalized protocol, usually approved by an accepted authority or organization, which can then be implemented by different vendors?

    1. Standard

    2. Protocol

    3. Model

    4. Domain

  7. Which three layers of the OSI model make up the application layer of the TCP/IP model? (Choose three.)

    1. Data link

    2. Network

    3. Transport

    4. Session

    5. Presentation

    6. Application

  8. Which organization publishes and manages the Request for Comments (RFC) documents?

    1. IEEE

    2. ISO

    3. IETF

    4. TIA/EIA

  9. Which two OSI model layers have the same functionality as a single layer of the TCP/IP model? (Choose two.)

    1. Data link

    2. Network

    3. Physical

    4. Session

    5. Transport

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