单选题A technician is attempting to determine whether a CAT5 patch cord is a straight-through or acrossover. Which of the following is the BEST to use to determine the cord type?（）ACable testerBLoopback cableCMultimeterDExtension magnet
单选题
A technician is attempting to determine whether a CAT5 patch cord is a straight-through or acrossover. Which of the following is the BEST to use to determine the cord type?（）
A
Cable tester
B
Loopback cable
C
Multimeter
D
Extension magnet
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