Among the following options, which functions can be used in high-density WLAN scenarios? (Multiple choice)

Question

Options

• AWireless Scheduling Based on Signal Quality
• BAdaptive antenna coverage direction adjustment
• CEnvironment-based wireless contention window
• DAdaptive power adjustment of dispatch port

• A
  80% (20)
• B
  20% (5)

Explanation

In high-density WLAN scenarios, the core challenge is managing many simultaneous clients efficiently while minimizing interference - options A, C, and D directly address this. A (Wireless Scheduling Based on Signal Quality) prioritizes airtime for clients with stronger signals, reducing retransmissions and improving aggregate throughput when many devices compete. C (Environment-based wireless contention window) dynamically expands or shrinks the 802.11 CSMA/CA contention window based on client density, directly reducing collision probability - critical when dozens of devices contend simultaneously. D (Adaptive power adjustment) lowers AP transmit power in dense deployments to shrink each cell's footprint, limiting co-channel interference between neighboring APs.

Option B is the distractor: adaptive antenna direction adjustment is a coverage-shaping technique used to fill dead zones or redirect signal - it optimizes where coverage goes, not how many clients are managed, making it a general coverage tool rather than a high-density-specific function.

Memory tip: Think "SCP" - Schedule by quality, Contention window, Power adjustment. All three manage the quantity of competing clients. Antenna direction (B) manages coverage shape, which is a different problem entirely.

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