Statement A is correct; it defines the core purpose of a Wireless Access Controller (WAC), which is to centralize the management, configuration, and monitoring of all associated Fit APs on the network. Statement D is also correct; a Fit AP's fundamental role is to provide the 802.11 wireless interface for client stations (STAs) and to bridge the traffic between the wireless medium and the wired network infrastructure, regardless of whether it is centrally managed or not.

B. This is false. This describes a Fat AP. In a WAC + Fit AP architecture, all configurations are performed on the WAC and then provisioned to the Fit APs.

C. This is false. The CAPWAP protocol, used for communication between a WAC and its APs, is IP-based and can operate over a Layer 3 network. The WAC and APs do not need to be in the same Layer 2 broadcast domain.

1. Huawei

"HCIA-WLAN V3.0 Training Material"

Chapter "WLAN Overview". This material explains the WAC+Fit AP architecture

stating

"The WAC is responsible for WLAN access control

AP configuration and management... The Fit AP is managed by the WAC in a centralized manner." (Supports A

contradicts B).

2. Huawei

"HCIA-WLAN V3.0 Training Material"

Chapter "WLAN Networking Mode". This chapter clarifies the roles

stating a Fit AP is "responsible for bridging and forwarding 802.11 packets and 802.3 packets." (Supports D).

3. IETF RFC 5415

"Control And Provisioning of Wireless Access Points (CAPWAP) Protocol Specification"

Section 1. Introduction. The RFC specifies that CAPWAP is designed to be independent of the underlying transport

running over UDP/IP

thus enabling communication across Layer 3 networks. (Contradicts C).