300-425 · Question #314
What is the purpose of Cisco Band Select?
The correct answer is A. Push clients to use the 5 GHz band instead of 2.4 GHz. Cisco Band Select steers dual-band clients toward the 5 GHz band by suppressing 2.4 GHz probe responses, reducing congestion on the crowded 2.4 GHz band.
Question
What is the purpose of Cisco Band Select?
Options
- APush clients to use the 5 GHz band instead of 2.4 GHz
- BImprove antenna gain for long corridors
- CIncrease MIMO stream count
- DPrioritize voice traffic over data
How the community answered
(54 responses)- A91% (49)
- B4% (2)
- C6% (3)
Why each option
Cisco Band Select steers dual-band clients toward the 5 GHz band by suppressing 2.4 GHz probe responses, reducing congestion on the crowded 2.4 GHz band.
Band Select works by delaying or suppressing 2.4 GHz probe responses so dual-band capable clients preferentially associate on 5 GHz instead. This reduces co-channel interference on the congested 2.4 GHz band and leverages the greater channel availability and throughput of 5 GHz. It is a client-steering mechanism configured on the wireless controller or access point, not a radio hardware feature.
Antenna gain optimization for corridors is achieved through directional or Yagi antennas, which is a physical RF design decision unrelated to Band Select.
MIMO stream count is determined by 802.11 radio hardware and the negotiated spatial streams between client and AP, not by Band Select.
Prioritizing voice traffic over data is handled by QoS mechanisms such as WMM and DSCP marking, not by Band Select.
Concept tested: Cisco Band Select dual-band client steering
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-10/config-guide/b_cg810/band_select.html
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