An engineer is designing a wireless network that will support many different types of wireless clients. When conducting the survey, which client must be used to ensure a consistent experience for all of the wireless clients?
"When designing a Wi-Fi environment and choosing locations for APs or antennas, it is necessary to know the needs of the application and to design for the worst performing clients"
- 6.6 Describing and Implementing the Wireless Design Process
With the proliferation of clients with varying wireless capabilities, it is important to survey for the ‘worst’ clients in order to ensure a consistent experience across all your clients once your wireless network is in production.
It's D
"The lower data rates in 11a can be disabled, the 24 Mbps
data rate can be set to “required”, and the rates of 36 to 54 can be left enabled. "
https://www.cisco.com/en/US/docs/solutions/Enterprise/Mobility/emob30dg/Voice.pdf
according to the official course (6.6 Describing and Implementing the Wireless Design Process) - "When designing a Wi-Fi environment and choosing locations for APs or antennas, it is necessary to know the needs of the application and to design for the worst performing clients"
Think of this: I'm not going to design a WiFi network for a few guy's that can't afford to upgrade their phones. There are 500 devices and 10 are old junk. What would you do? Answer = "B"
The Provided answer is correct as the question is asking which client to use in the designing of the network, you are going to choose the one that is most used to ensure the majority. The most poorly or worst answer D is a referenced by Roger the preferred client to use in a Post Site Survey as stated in the Referenced Cisco Guide supplied by Roger.
The question is: " When conducting the survey..."
But even in the design you have to identify all possible clients. This will serve a twofold purpose:
- You can verify that your design support each device type
- You can identify the least capable of the supported devices, which will define some minimum design requirements
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