Author: examcert

Enterprise Network Topologies (37.2.4)Two types of network topologies that you have learned about are Figure 37-13 displays a sample physical topology for a small sample network. The topology identifies the physical location and function of the devices. Figure 37-13 A Physical Topology Figure 37-14 displays a sample logical topology for the same small sample network….

Network Topologies and Descriptions (37.2.2) Networks vary in size depending on the networking requirement. A technician must be knowledgeable about the different types of networks available to connect end devices and corporate sites, as described by the following sections. PAN A personal area network (PAN) is a network that connects devices such as mice, keyboards,…

Guidelines for Selecting a Troubleshooting Method (37.1.5) To quickly resolve network problems, take the time to select the most effective network troubleshooting method. Figure 37-3 illustrates which method could be used when a certain type of problem is discovered. Figure 37-3 Different Troubleshooting Methods Used for Different Types of Problems For instance, software problems are…

ObjectivesUpon completion of this chapter, you will be able to answer the following questions: Key TermsThis chapter uses the following key terms. You can find the definitions in the Glossary.baselinebottom-up troubleshootingCisco Discovery Protocol (CDP)divide-and-conquer troubleshootingtop-down troubleshooting Introduction (37.0) Hello! It’s Webster. Let me introduce you to my friend Lara! Lara has been working as a…

The tracert utility provides connectivity information about the path a packet takes to reach the destination and about every router (hop) along the way. It also indicates how long a packet takes to get from the source to each hop and back (round-trip time). Tracert can help identify where a packet may have been lost…

Gather Information In this step, targets (i.e., hosts, devices) to be investigated must be identified, access to the target devices must be obtained, and information gathered. During this step, the technician may gather and document more symptoms, depending on the characteristics that are identified. Analyze Information Possible causes must be identified. The gathered information is…

Troubleshoot Common Network Problems Summary (36.6) The following is a summary of each topic in the chapter and some questions for your reflection. What Did I Learn in This Chapter? (36.6.1) • The Troubleshooting Process—Troubleshooting is the process of identifying, locating, and correcting problems that occur. There are structured techniques that can be used to…

Support Desk Interaction (36.5.3)As an end user, it is important to give the support desk as much information as possible, as shown in Figure 36-13. The support desk will require information on any service or support plans that are in place along with specific details of the affected equipment. This can include make, model, and…

The nslookup Command (36.4.8) When a network device is being configured, one or more DNS server addresses are provided that the DNS client can use for name resolution. Usually, the ISP provides the addresses to use for the DNS servers. When a user application requests to connect to a remote device by name, the requesting…

Although ping is the most commonly used network troubleshooting command, there are other useful commands that are available on Windows devices. The ping command can verify end-to-end connectivity. However, if a problem exists and the device cannot ping the destination, the ping command does not indicate where the connection was really dropped. To pinpoint this,…