Review Questions
Use this chapter and your practical troubleshooting knowledge and skills to answer the following questions. The answers are located in Appendix A, “Answers to Review Questions.”
| 1: | The Transport Layer is the host-to-host layer in the OSI model and the TCP/IP suite. It is in-between the upper and lower layers and depending on the protocol is responsible for delivery, error detection, and correction. Describe the upper layers of the OSI model and include examples. |
| 2: | Describe the lower layers of the OSI model and include examples. |
| 3: | Draw a picture showing the differences between OSI layers and TCP/IP layers. |
| 4: | Explain encapsulation using the appropriate protocol data unit terminology. |
| 5: | Explain de-encapsulation, including how Layer 2 hands off to Layer 3, how Layer 3 hands off to Layer 4, and so on. |
| 6: | What is the difference between a hub, switch, and router? |
| 7: | What is the difference between routed and routing protocols? Give examples of each. |
| 8: | Describe packet flows through routers. |
| 9: | How can the OSI model assist in troubleshooting? |
| 10: | List the seven steps of the Cisco troubleshooting model? |
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