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Zorluk: OrtaWireless Principles and Architecture

An enterprise deployment uses Cisco Lightweight Access Points (LAPs) operating in a Centralized Split-MAC architecture with a central Wireless LAN Controller (WLC). Which two real-time MAC layer functions are performed directly by the Access Point rather than the WLC? (Select TWO.)

  1. Transmission of 802.11 beacon and probe response framesCevap
  2. Real-time 802.11 frame encryption and decryptionCevap
  3. C
    Processing and management of client 802.11 association and reassociation requests
  4. D
    Translation of 802.11 wireless frames to 802.3 Ethernet frames for centralized network distribution
  5. E
    Coordination of inter-AP seamless mobility and client layer 2 roaming

Cevap

In a Cisco Split-MAC architecture, the Access Point handles real-time frame transmission (beacons/probe responses) and hardware layer encryption/decryption, while management and control functions are handled by the WLC.
In a Split-MAC architecture, real-time RF tasks that demand precise timing (such as generating 802.11 beacons, responding to probe requests, and performing hardware-level frame encryption/decryption) are processed directly by the AP hardware.

Adım Adım Çözüm

1
Analyze the functional division in Cisco Split-MAC architecture
Split-MAC divides duties based on real-time sensitivity vs. centralized management.
Tasks requiring microsecond-level timing are offloaded to the AP radio hardware.
2
Identify AP real-time MAC functions
Beacon generation, probe responses, MAC-layer frame buffering, and hardware encryption/decryption are AP duties.
Latency-sensitive radio tasks cannot tolerate the round-trip delay of a CAPWAP tunnel to the controller.
3
Identify central WLC management functions
Client authentication/association, 802.11 to 802.3 frame translation, and roaming coordination belong to the WLC.
Centralizing management ensures consistent policy enforcement and seamless mobility.

Anahtar Kavram

Split-MAC Architecture Division of Responsibilities
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Konular

Wireless Principles and Architecture

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