Summary

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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