单项选择题

Which of the following 802.11 standards can operate at both 2.4 GHz and 5.0 GHz?（）

A.A
B.B
C.G
D.N

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单项选择题

Which of the following is the correct pin out for T568B?（）

A. Orange/white, orange, green/white, blue, blue/white, green, brown/white, brown
B. Blue, blue/white, orange/white, orange, brown/white, brown, green/white, green
C. Green/white, green, orange/white, blue, blue/white, orange, brown/white, brown
D. Orange/white, orange, brown/white, brown, green/white, green, blue, blue/white

单项选择题

Which of the following is a multimedia device?（）

A. Biometric device
B. Mouse
C. Camcorder
D. Infrared scanner

单项选择题

Which of the following cable types is 68-pin?（）

A.Floppy
B.SCSI
C.IEE1394
D.IDE