200-301 ccna 9tut

200-301 ccna 9tut.correct cable sequence instead). While several of the other issues are correct and important facts, none of them have a specific way to solve the problem. Therefore, the root cause analysis reduces the above problem to two steps as follows. Step 1 Continue to isolate the problem until the true root cause is identified and an obvious solution is found. Step 2 If after narrowing down the problem the root cause is still not found, isolate the problem as finely as possible and change certain settings of the network as appropriate in the hope that by observing the changes that occur, this will help find the root cause. 4. Practicalities and examsIn the exam, you need to look for clues from the exam questions in order to troubleshoot. For example, in the network shown in Figure 3-1, if all of the multiple choice answers relate to VLANs and STP, then you should start by examining the LAN environment. Note that it may still be necessary to consider Layer 1, Layer 2, and Layer 3, as well as the details of the data platform and the control platform, to help find the answer to the question.Tip: The content of this subsection can be applied to troubleshooting problems in the usual sense, but since this chapter is the first troubleshooting-related chapter in the book, this subsection is included in this chapter. :.This concludes the introduction to troubleshooting methods. The next section will explore in detail how to troubleshoot LAN switching on the ICND1 exam54 Chapter 3 Troubleshooting LAN Switchingthe basics of the problem.3.2.2 Troubleshooting the LAN Switching Data PlatformTip: Before you begin the second part of this chapter, take a look at a few study tips. Relax, tone down your breathing, and get ready. The next major section is longer, about the average length of the "Basic Topics" section in most chapters. If you want to stop during this longer section, try to get through the next Step 1, Step 2, etc. *.The general troubleshooting strategy presented so far in this chapter is to recommend starting with the IP routing process at Layer 3. If the administrator can find a problem at one step of the IP forwarding process, the next step is to examine the routing steps in more detail, including looking at the status of Layer 1 and Layer 2. If the routing steps for the LAN are normal, that means that the details of that subsection can be used to solve the problem and identify the root cause.This is followed by the second major part of the chapter, details of the tools and methods used to troubleshoot LAN-switched data platforms on Layer 1 and Layer 2. Everything after this chapter assumes that the root cause is a LAN problem and not a Layer 3 problem. IPv4 troubleshooting at Layer 3 is covered in Chapters 4, 5, and 11. This chapter also covers the control platform protocols, specifically the Spanning Tree Protocol (STP), but these two protocols have been covered in the previous two chapters. Therefore, the focus of this section is on troubleshooting LAN-switched data platforms.