双绞线电缆中的4对线用不同的颜色来标识， EIA/TIA 568A 规定的线序为（），而EIA/TIA T568B 规定的线序为（）。
- A.橙白 橙 绿白 蓝 蓝白 绿 褐白 褐
- B.蓝白 蓝 绿白 绿 橙白 橙 褐白 褐
- C.绿白 绿 橙白 蓝 蓝白 橙 褐白 褐
- D.绿白 绿 橙白 橙 蓝白 蓝 褐白 褐
正确答案及解析
正确答案
解析
本题考查双绞线EIA/TIA 568A/B两种线序标准，具体线序如下表所示：
表1 568A/568B标准
从表中可以发现，568A与568B的差异主要是1、2与3、6两组绞线对调，其它的脚位是一样的。
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