Which infrastructure issue needs to be verified and potentially resolved before deploying a centralized 802.11n WLAN?

Question

Options

• AThat all the access layer switches that the 802.11n APs will connect to support 802.3af
• BThat all the access layer switches that the 802.11n APs will connect to contain 10/100/1000
• CThe location of application and authentication servers.
• DThe proposed location for the WDS server.
• EThe proposed location for the WCS.

• A
  15% (5)
• B
  73% (24)
• C
  3% (1)
• D
  3% (1)
• E
  6% (2)

Explanation

802.11n access points can deliver throughput exceeding 100 Mbps, which means the access layer switches they connect to must have 10/100/1000 (Gigabit) ports. A 100 Mbps Fast Ethernet uplink would become a bottleneck, negating the performance gains of 802.11n. Option A (802.3af) is incorrect because 802.3af standard PoE (15.4W) may actually be insufficient for full 4-stream 802.11n APs-the concern is more about 802.3at (PoE+)-but the more universally required infrastructure upgrade is Gigabit switching. Options C, D, and E relate to server/controller placement, which are design decisions, not infrastructure prerequisites for 802.11n specifically.

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