Believe me, this is going to be a challenging question. :)
Below is excerpted from Sybex CCNA Study Guide 6th Edition Page 715:
the controller only forwards LWAPP packets coming from an LWAPP-enabled port, which means a switch or router is required to take an LWAPP packet and forward it out as IP data to a non-LWAPP network. A mid-range switch can handle the routing.
Below is excerpted from "Deployment Guide: Cisco Mesh Networking Solution Release 3.2": A switch or router between the Cisco wireless LAN controller and the RAP is required because Cisco wireless LAN controllers do not forward Ethernet traffic coming from an LWAPP-enabled port.
Pay attention to the lines: "forwards LWAPP packets coming from an LWAPP-enabled port", and "do not forward Ethernet traffic coming from an LWAPP-enabled port".
My first question would be what is the definition for "LWAPP-enabled port"? What is it? Where is it? By knowing this, I think I can understand the sentences. :)
Additionally, can someone eleborate more about why switch or routing is required for routing wireless data for me to have better visualization?
I have used Google and Wikipedia but no light. Hope can find some light here. Thanks in advanced. :)