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Zorluk: OrtaWireless Network Deployment and Standards

A network administrator is designing a high-density enterprise wireless network using Wi-Fi 6 (802.11ax) access points. The goal is to optimize spectrum efficiency, reduce co-channel interference (CCI) in overlapping coverage areas, and efficiently support a large volume of concurrent client connections. Which of the following features or deployment strategies should the administrator implement? (Select TWO.)

  1. Enable Orthogonal Frequency-Division Multiple Access (OFDMA) to divide channels into smaller subcarriers for concurrent multi-user transmissions.Cevap
  2. Implement BSS Coloring to differentiate between overlapping Basic Service Sets and allow spatial reuse of frequencies.Cevap
  3. C
    Assign contiguous channels 1, 2, and 3 across adjacent access points operating on the 2.4 GHz frequency band.
  4. D
    Configure 40 MHz channel bonding on all 2.4 GHz access points to increase per-client throughput.
  5. E
    Disable the 5 GHz radios on access points to consolidate all traffic onto the 2.4 GHz spectrum for superior wall penetration.

Cevap

Enabling Orthogonal Frequency-Division Multiple Access (OFDMA) and implementing BSS Coloring.
The correct responses are enabling Orthogonal Frequency-Division Multiple Access (OFDMA) and implementing BSS Coloring. OFDMA allows an AP to split a single channel into smaller frequency allocations (Resource Units), serving multiple clients concurrently to maximize airtime efficiency. BSS Coloring tags frames with a color field in the 802.11ax header, allowing devices to differentiate between their own BSS and neighboring overlapping BSSs on the same channel, thereby allowing adaptive clear channel assessment (CCA) thresholds and spatial reuse.

Adım Adım Çözüm

1
Analyze high-density Wi-Fi 6 multi-user requirements.
Identify that OFDMA divides channels into Resource Units (RUs), allowing parallel transmissions to multiple low-throughput and high-density devices simultaneously.
OFDMA addresses contention and latency issues in crowded wireless environments.
2
Evaluate co-channel interference (CCI) mitigation techniques in 802.11ax.
Identify that BSS Coloring marks frames with a BSS color identifier so APs and clients can ignore transmissions from neighboring overlapping BSSs operating on the same channel.
BSS Coloring enables spatial reuse, reducing unnecessary channel contention back-offs caused by co-channel interference.
3
Verify incorrect options regarding channel planning.
Discard options suggesting overlapping 2.4 GHz channel assignments (channels 1, 2, 3), 40 MHz channel bonding in 2.4 GHz, or disabling 5 GHz radios, as all these introduce extreme co-channel and adjacent-channel interference.
Proper 2.4 GHz channel design strictly uses non-overlapping channels 1, 6, and 11 with 20 MHz width, and relies on 5 GHz / 6 GHz for high-density capacity.

Anahtar Kavram

Wi-Fi 6 (802.11ax) High-Density Features & Channel Planning
Tahmini Süre:1m 30s
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Konular

Wireless Network Deployment and Standards

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