【单选题】
When testing a CAT5 cable, the technician notices that pin A is open. However, the cable stillworks fine. Which of the following describes how this is possible?（）
A、The cable was tested for 100Base-TX.
B、The cable is a 1000BaseT cable.
C、The switch uses link aggregation,
D、The switch was setup to use MDIX
查看正确答案
