200-301 cbt nuggets

200-301 cbt nuggets.While data platform processing is the process of completing general troubleshooting by itself checking the forwarding logic relationship of each device, general troubleshooting of control platform processes is quite different. Each control-platform process can be checked separately. For example, methods for troubleshooting various types of STP faults are explained in Chapter 2.(3 ) Prediction of normal operation: a short summary of the methodSome of the questions on the exam will require analysis and prediction of uptime for the currently operating network. In some cases, predicting uptime is only a preliminary question; the next step is to isolate and resolve the problem. In any case, if the narrative of the exam does not give any specific clues about the network problem, you can follow the steps summarized below to find the answer.Step 1 Follow these steps to review the data platform. a.Identify the major steps in Layer 3, including the source from the host to the default router, each router to the next router, and the last router to the destination host, noting that the step is bidirectional. b.For each Layer 2 network between a host and a router or between two routers, analyze the forwarding logic for each device.Step 2 Follow these steps to examine the control platform. a.Identify the control platform protocols applied and the critical forwarding processes. b.Examine each correctly functioning critical control platform protocol for which the details of the analysis differ for each protocol.c. The analysis of control platform protocols that do not affect the correct operation of the data platform can be deferred unless the answer to the problem is found to clearly require the analysis of such protocols (CDP).2. Problem isolationTroubleshooting is the process of finding the root of a problem and then solving away that problem. To find the problem, you first need to isolate the problem. Isolating the problem allows you to move from a general understanding of the problem to a specific awareness of the problem, as follows.Pre-isolation: Knowing nothing but the surface problem.After the problem is isolated: You can find out what the problem is and which device it is on by comparing it to the "what should be condition".