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…
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Troubleshoot Common Network Problems Summary-2
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 – 100-150 Exam Study Guide
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-1
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 – 100-150 Exam Study Guide
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 – 100-150 Exam Study Guide
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…
The tracert Command – 100-150 Exam Study Guide
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,…
Common Internet Connectivity Issues
Common Internet Connectivity Issues (36.4) There are several connectivity issues that can be attributed to other devices such as the DHCP server or with reaching the ISP. DHCP Server Configuration Errors (36.4.1) If the physical connection to the wired or wireless host appears to be connecting as expected but the host cannot communicate on remote…
Troubleshoot Wireless Issues
Troubleshoot Wireless Issues (36.3) Troubleshooting a wireless LAN is similar to troubleshooting a wired LAN, but there are some important differences associated with the wireless signal and the access point. Causes of Wireless Issues (36.3.1) If the wireless client is unable to connect to the AP, it may be because of wireless connectivity problems. Wireless…
Wireless Router LEDs – 100-150 Exam Study Guide
Wireless Router LEDs (36.2.2) Regardless of whether the fault is present on the wireless or wired network, one of the first steps in a bottom-up strategy of troubleshooting should be to examine the LEDs, which indicate the current state or activity of a piece of equipment or connection. LEDs may change color or flash to…