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Zorluk: OrtaWireless Network Deployment and Standards

A network engineer is configuring a newly installed multi-floor wireless deployment for a medical clinic. The deployment must support high-density client access on both the 2.4 GHz2.4\text{ GHz} and 5 GHz5\text{ GHz} bands while minimizing co-channel and adjacent-channel interference between adjacent access points (APs). Which of the following design and configuration strategies should the engineer implement to fulfill these requirements? (Select TWO.)

  1. Restrict 2.4 GHz2.4\text{ GHz} radio configurations strictly to non-overlapping channels 11, 66, and 1111 using a 20 MHz20\text{ MHz} channel bandwidth.Cevap
  2. B
    Configure adjacent access points on the 2.4 GHz2.4\text{ GHz} band to use overlapping channels 22, 77, and 1212 to balance client connections.
  3. Enable Dynamic Frequency Selection (DFS) channels in the 5 GHz5\text{ GHz} spectrum to increase available non-overlapping channels where radar co-existence is permitted.Cevap
  4. D
    Enable 80 MHz80\text{ MHz} channel bonding across all 2.4 GHz2.4\text{ GHz} radios to maximize wireless data throughput for medical imaging devices.
  5. E
    Assign identical 5 GHz5\text{ GHz} channel numbers to all adjacent access points on the same floor to force seamless client roaming.

Cevap

The correct strategies are restricting the 2.4 GHz band to non-overlapping channels 1, 6, and 11 with 20 MHz bandwidth, and enabling Dynamic Frequency Selection (DFS) channels in the 5 GHz spectrum to expand non-overlapping channel capacity.
Restricting 2.4 GHz radios to channels 1, 6, and 11 using 20 MHz channel width ensures that adjacent APs operating on 2.4 GHz do not cause mutual adjacent-channel interference. Additionally, configuring DFS on 5 GHz radios unlocks additional non-overlapping channels (UNII-2 and UNII-2 Extended), dramatically reducing co-channel interference across multi-AP enterprise deployments.

Adım Adım Çözüm

1
Analyze 2.4 GHz channel planning principles
The 2.4 GHz ISM band has 14 sub-channels spaced 5 MHz apart. For 20 MHz channel widths in standard regulatory domains, only channels 1, 6, and 11 do not overlap with one another.
Using overlapping channels (such as 2, 7, 12) or wide channel bonding in 2.4 GHz leads to corrupt packets and performance drops due to adjacent-channel interference.
2
Evaluate 5 GHz spectrum optimization methods
Dynamic Frequency Selection (DFS) allows access points to use additional 5 GHz spectrum channels (UNII-2 / UNII-2 Extended) provided they automatically monitor and yield to radar signals.
Enabling DFS expands the pool of available non-overlapping 5 GHz channels, mitigating co-channel interference in multi-AP high-density deployments.

Anahtar Kavram

Wireless Channel Allocation and Frequency Band Optimization
Tahmini Süre:1m 30s
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