4. A single 802.11g access point has been configured and installed in the center of a square office. A few wireless
users are experiencing slow performance and drops while most users are operating at peak efficiency. What are
three likely causes of this problem? (Choose three.)
A. mismatched TKIP encryption
B. null SSID
C. cordless phones
D. mismatched SSID
E. metal file cabinets
F. antenna type or direction
Answer: CEF
解释:这道题是有关WLAN(无线)的知识,题目中说无线网络效率低,但是还是可以用,所以可以采用排除法来
做这道题,A答案,加密不对,无线网络不能通,所以肯定不是网络效率低的问题,B答案,没有SSID也不能
使用无线网络,SSID是无线网络的一个标识符,必须要有,D答案,SSID不一样同样不能使用无线网络,
所以,这题ABD都是错的,他们会导致整个网络不通,肯定不是效率低的问题,所以选CEF
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