Old 2.4-GHz wireless laptops are unable to connect. What is the most likely cause of this
problem?
A.
WLAN > General properties are incorrectly configured.
B.
WLAN > QoS properties are incorrectly configured.
C.
WLAN > Security properties are incorrectly configured.
D.
WLAN > Advanced properties are incorrectly configured.
E.
Wireless > AP > 802.11 b/g/n AP is incorrectly configured.
F.
Wireless > AP > 802.11 b/g/n > Network is incorrectly configured.
Explanation:
Clienlink is not enabled and should be in a mixed client environment. Many networks still support a
mix of 802.11a/g and 802.11n clients. Because 802.11a/g clients (legacy clients) operate at lower
data rates, the older clients can reduce the capacity of the entire network. Cisco’s ClientLink
technology can help solve problems related to adoption of 802.11n in mixed-client networks by
ensuring that 802.11a/g clients operate at the best possible rates, especially when they are near
cell boundaries.
Clientlink enhances performance in mixed client environments, but the issue listed that clients can’t connect.
I think it’s more likely to be that no WPA policy is enabled…
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The screenshot indicates that all 2.4GHz data rates (1,2,5.5,11 Mbps) data rates are disabled, right. Wouldn’t this be the more viable explanation?
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Disregard. I had erroneously thought OFDM only supported 5GHz which led to my error in limiting the available data rates for the 2.4GHz band.
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I agree that ClientLink is only an enhancement ; not causing connection issue.
However WMM/802.11e has been introduced in 2005. If QoS requires WMM, non-capable devices (ie. old devices) won’t connect. I would pick answer B.
WPA Policy is a likely option as well.
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I would think the WPA2 TKIP would not be a problem as it is supported in everything except 802.11n. Anymouse may be onto something with the data rates though. Legacy 802.11b clients would not be able to connect using this network as 802.11b is only available up to 11mbs. These speeds are disabled. 11a/g would be fine connecting as everything is supported. Answer should be F as stated, but not because of clientlink.
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