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300-365 · Question #180

A large number of clients are trying to stream an on-demand instruction in a large auditorium. Which two configuration changes on the WLC ensure that there is enough bandwidth to support the client…

The correct answer is A. QoS profiles C. 80 MHz bonded channels on 5 GHz. To support high client density streaming without adding APs, QoS profiles prioritize media traffic and 80 MHz channels on 5 GHz maximize per-radio throughput.

Wireless Troubleshooting and Optimization

Question

A large number of clients are trying to stream an on-demand instruction in a large auditorium. Which two configuration changes on the WLC ensure that there is enough bandwidth to support the client load without adding any APs? (Choose two.)

Options

  • AQoS profiles
  • Blower radio transmit power
  • C80 MHz bonded channels on 5 GHz
  • D2.4 GHz SSIDs only
  • Eincrease radio transmit power

How the community answered

(35 responses)
  • A
    80% (28)
  • B
    6% (2)
  • D
    11% (4)
  • E
    3% (1)

Why each option

To support high client density streaming without adding APs, QoS profiles prioritize media traffic and 80 MHz channels on 5 GHz maximize per-radio throughput.

AQoS profilesCorrect

QoS profiles on the WLC enable traffic prioritization and bandwidth management, ensuring streaming video receives the necessary priority and that no single client monopolizes the shared medium during high-density events. This is configured under the WLC QoS policy and applied per SSID or WLAN.

Blower radio transmit power

Lowering transmit power reduces cell coverage and can degrade the signal-to-noise ratio for distant clients, reducing throughput rather than increasing available bandwidth.

C80 MHz bonded channels on 5 GHzCorrect

80 MHz channel bonding on 5 GHz doubles the available channel width compared to 40 MHz, significantly increasing aggregate throughput on each AP radio without deploying additional hardware, which directly addresses bandwidth demands in a high-density scenario.

D2.4 GHz SSIDs only

Restricting clients to 2.4 GHz SSIDs limits available spectrum to three non-overlapping channels with lower maximum throughput, which worsens congestion in a high-density environment.

Eincrease radio transmit power

Increasing transmit power does not add capacity or bandwidth; it can actually increase co-channel interference from neighboring APs, degrading overall network performance.

Concept tested: WLC high-density configuration for streaming video

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/config-guide/b_cg85/qos.html

Topics

#QoS profiles#80 MHz channels#high density#bandwidth optimization

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