In this chapter, you learned about the Cisco UWN architecture and wireless design principles. The following topics were explored:
■ An introduction to RF theory, including phenomena affecting RF signals, RF signal calculations, and types of RF antennas
■ The 802.11 standards, including the 802.11a/b/g half-duplex standards for wireless communication
■ WLAN components, including the differences between autonomous and lightweight APs
■ WLAN security, including authentication and encryption
■ The Cisco UWN, including lightweight APs, WLCs, and the WCS management application
■ LWAPP operation between the lightweight APs and WLCs, in Layer 2 or Layer 3 mode
■ The terminology related to and operation of WLCs, including how lightweight APs discover and join with WLCs
■ Mobility, the capability of end devices to move to new locations and remain networked, and roaming, when a wireless client moves its association from one AP and reassociates to another AP within the same SSID
■ The real-time RRM in the Cisco UWN, which continuously analyzes the existing RF environment and automatically adjusts the AP power and channel configurations
■ The RF site survey process and its importance in the design process
■ Controller redundancy design, both dynamic and the recommended deterministic redundancy with predefined primary, secondary, and tertiary controllers
■ Design considerations for using lightweight APs and WLCs in various scenarios, including for guest services, outdoor wireless networks, campus wireless networks, and branch wireless networks
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