You are designing a wireless network to support voice and video applications. The customer is requesting to use the 2.4 Ghz band only because they primarily use 802.11b legacy devices. Which two…

The correct answer is B. Set the mandatory data rate to 11 Mbps. E. Set the mandatory data rate to 5.5 Mbps. When designing for voice/video on a 2.4 GHz 802.11b-only network, you must minimize low-rate transmissions that waste airtime. 802.11b supports 1, 2, 5.5, and 11 Mbps. Setting both 5.5 Mbps (E) and 11 Mbps (B) as mandatory (basic) rates disables the 1 Mbps and 2 Mbps rates…

WLAN Design

Question

You are designing a wireless network to support voice and video applications. The customer is requesting to use the 2.4 Ghz band only because they primarily use 802.11b legacy devices. Which two must be considered? (Choose two.)

Options

ADisable the data rates below 11 Mbps and set the rest as supported.
BSet the mandatory data rate to 11 Mbps.
CSet the mandatory data rate to 12 Mbps.
DDisable the data rates below 12 Mbps and set the rest as supported.
ESet the mandatory data rate to 5.5 Mbps.

How the community answered

(29 responses)

A
3% (1)
B
72% (21)
C
7% (2)
D
17% (5)

Explanation

When designing for voice/video on a 2.4 GHz 802.11b-only network, you must minimize low-rate transmissions that waste airtime. 802.11b supports 1, 2, 5.5, and 11 Mbps. Setting both 5.5 Mbps (E) and 11 Mbps (B) as mandatory (basic) rates disables the 1 Mbps and 2 Mbps rates, which cause excessive airtime consumption and degrade voice quality. Clients that can only use 1 or 2 Mbps will be denied association, keeping the medium efficient. Options A and D suggest disabling below 12 Mbps, which is an 802.11a/g rate and incompatible with 802.11b. Option C (12 Mbps mandatory) is not a valid 802.11b rate.

Topics

#mandatory data rates#802.11b legacy#2.4GHz voice#rate configuration

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