单选题An administrator receives reports from users in an office that their 802.11g wireless connectivity has been problematic since the installation of the new wireless phone system. At which of the following frequencies are both systems operating at to cause this issue?（）A2.4GHzB900MHzC1.1GHzD5GHz
单选题
An administrator receives reports from users in an office that their 802.11g wireless connectivity has been problematic since the installation of the new wireless phone system. At which of the following frequencies are both systems operating at to cause this issue?（）
A
2.4GHz
B
900MHz
C
1.1GHz
D
5GHz
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解析：
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