企业无线网络规划的拓扑图如下所示，使用无线协议是802.11b/g/n，根据IEEE规定，如果AP1使用1号信道，AP2可使用的信道有2个，是（ ）。
- A.2和3
- B.11和12
- C.6和11
- D.7和12
正确答案及解析
正确答案
解析
本题考查无线网络的基本知识。
2.4GHz无线网络信道划分是按照每5MHz一个信道划分，每个信道22MHz，将2.4GHz频段划分出13个信道，而这13个信道中有相互覆盖和相互重叠的情况，为了无线网络能够互不干扰的工作，在13个信道中（其中部分国家只开通到了11信道），所以只有3个信道可用：1、6、11 号信道。
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