【单选题】
现场用电脑认证上网正常,但远程无法PING通AP管理地址,也无法远程登陆管理,可能是由于下列哪种原因导致___
A. AP网关配置错误
B. AP在线用户数过多
C. AP被配置为802.11g/b 模式
D. 现场存在非法AP
E.
F.
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