Author: examcert

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 (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 (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…

Guidelines for Selecting a Troubleshooting Method (36.1.5) To quickly resolve network problems, take the time to select the most effective network troubleshooting method. Figure 36-4 illustrates which method could be used when a certain type of problem is discovered. Figure 36-4 Selecting a Troubleshooting Method For instance, software problems are often solved using a top-down…

ObjectivesUpon completion of this chapter, you will be able to answer the following questions: Introduction (36.0) Diego has completed her task of designing and setting up a new branch network. He will need to test it, and if there are problems, she will diagnose and fix them. I want to know how to test, diagnose,…

Structured Troubleshooting Methods (36.1.4) There are several structured troubleshooting approaches that can be used. Which one to use will depend on the situation. Each approach has its advantages and disadvantages. This section describes methods and provides guidelines for choosing the best method for a specific situation. Bottom-Up In bottom-up troubleshooting, you start with the physical…

Summary (35.6) The following is a summary of each topic in the chapter and some questions for your reflection. What Did I Learn in This Chapter? (35.6.1) • Cisco Switches—A switch is used to connect devices on the same network. A router is used to connect multiple networks to each other. When selecting a switch…

Router Boot Process (35.5) Since the router is just a specialized computer, the boot process is the same as most computers. Power Up the Router (35.5.1) Before beginning any equipment installation, it is important to be sure to read the Quick Start guide and other documentation that is included with the device. The documentation contains…

IOS Startup Files (35.3.4) As shown in Figure 35-16, a Cisco device loads the following two files into RAM when it is booted: • IOS image file—The IOS facilitates the basic operation of the device’s hardware components. The IOS image file is stored in flash memory. • Startup configuration file—The startup configuration file contains commands…

Switch Boot Process (35.3) Cisco switches go through a boot process similar to that of your computer or smartphone. Ethernet switches in small networks usually do not require any configuration. They are designed to work “right out of the box.” Power Up the Switch (35.3.1) Cisco switches, like most switches, are preconfigured to operate in…