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Difficulty: EasyWireless Principles and Architecture

Under the Cisco Split-MAC architecture, a Lightweight Access Point (LAP) operates in Local mode. Which task is handled directly by the access point rather than being offloaded to the Wireless LAN Controller (WLC)?

  1. Transmitting 802.11 beacon frames and responding to probe requestsAnswer
  2. B
    Processing 802.1X client authentication and association requests
  3. C
    Managing inter-controller client roaming and mobility state
  4. D
    Translating 802.11 wireless frames to 802.3 Ethernet frames for centralized data traffic

Answer

Transmitting 802.11 beacon frames and responding to probe requests is performed locally by the Lightweight Access Point.
Transmitting 802.11 beacon frames and responding to probe requests are time-sensitive real-time MAC functions handled locally by the access point hardware in Split-MAC architecture.

Step-by-Step Solution

1
Identify the role of Split-MAC architecture
Split-MAC divides 802.11 protocol functions between real-time MAC functions on the AP and management MAC functions on the WLC.
Real-time duties requiring immediate time-sensitive transmission are assigned directly to the AP hardware.
2
Differentiate AP duties from WLC duties
Beacons, probe responses, and frame acknowledgment occur on the AP, whereas authentication, association, and frame bridging occur on the WLC.
This allows central management of security and policy while offloading high-frequency time-critical RF duties to the AP.

Key Concept

Split-MAC Architecture and Real-Time vs Management MAC Duties
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Topics

Wireless Principles and Architecture

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