A wireless administrator has configured a WLAN; however, the clients need access to a less congested 5-GHz network for their voice quality. What action must be taken to meet the requirement?
The correct response is D. Band Select encourages capable clients to use 5 GHz instead of congested 2.4 GHz. This can improve voice quality when the 5-GHz band has more available capacity and less interference. For Cisco CCNA 200-301 v1.1, the important point is the mechanism, not a generic description of the technology. AAA Override affects authorization attributes, RX-SOP changes receive sensitivity behaviour, and DTIM relates to power-save delivery timing. When this appears in a network, the symptom normally confirms the answer: the route installed, the state selected, the packet forwarded, the wireless client behaviour, or the management workflow will follow this rule. That is why this answer is the best fit for the scenario and not just a plausible networking term.
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