pearson ccna 200 301

pearson ccna 200 301.After the discovery and join process occurs and the mirror on the controller and AP are identical, the AP obtains its configuration from the controller. This process occurs during the configuration data phase, as shown in Figure 11.7.154 Chapter 11 Discovering and Associating ControllersFigure 11-7 AP Obtaining Configuration11.2 Basic Themes 155as a response. If no controller responds, the AP then goes to a Layer 2 broadcast and starts the process over. The Cisco implementation uses a search ( hunting) process and a discovery algorithm to find as many controllers as possible. The AP uses the search and discovery process to build a WLC list and then selects a controller from that list and joins that controller. The search process for this controller is repeated until at least one WLC is discovered and joined. IOS-based APs perform only Layer 3 discovery.After this configuration is applied, the AP is turned on and running.11.2.5 Redundancy of APs and ControllersToday's networks involve data in various critical forms, whether it is a voice service or a business transaction. Redundancy is essential, and there are two types of redundancy forms that you need to be familiar with for the CCNA Wireless Communications exam.AP redundancy. Controller redundancy. AP redundancy can be seen when many APs exist in the same RF domain. AP redundancy is designed for self-recovery when coverage is not adequatedesigned for self-recovery when coverage is not adequate. This includes increasing the power level, which is achieved by increasing the level by one or two levels, or even by changing its operating channel.