19 Wireless LAN architectures

 

This chapter covers

  • The structure of 802.11 frames and their types
  • Standalone, lightweight, and cloud-based AP architectures
  • The various wireless LAN controller deployment options

In the previous chapter, we covered the basic building blocks of wireless LANs, starting with the fundamentals of radio frequency (RF) and connecting devices wirelessly in different types of service sets. In this chapter, we will continue on that theme by examining 802.11 frames and message types. We will then zoom out and look at the bigger picture—the different ways wireless access points (APs) can be deployed and managed to provide wireless access to clients in networks of all sizes. Specifically, we will cover the following CCNA exam topics:

  • 1.1 Explain the role and function of network components
    • 1.1.e Controllers
  • 2.6 Compare Cisco Wireless Architectures and AP modes
  • 2.7 Describe physical infrastructure connections of WLAN components (AP, WLC, access/trunk ports, and LAG)
  • 2.8 Describe network device management access (Telnet, SSH, HTTP, HTTPS, console, TACACS+/RADIUS, and cloud mnaged)

19.1 802.11 frames and message types

19.1.1 The 802.11 frame format

19.1.2 The client association process

19.1.3 802.11 message types

19.2 AP architectures

19.2.1 Autonomous APs

19.2.2 Lightweight APs