单项选择题
Which of the following is typically used In an LAN environment?（）
A.10GBase-SW
B.10GBase-LW
C.10GBase-SR
D.10GBase-EW
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Which of the following tools are BEST used to cut away the outside covering of a CAT5e cable?（）
A. Stripper
B. Punch down tool
C. Butt set
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单项选择题
Which of the following is true about an IP address if the first bit is a zero?（）
A. The address is a Class A address.
B. The address is a Class B address.
C. The address is a Class C address.
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单项选择题
Which of the following cable speeds would provide the GREATEST theoretical bandwidth?（）
A.1000Base-T
B.100Base-T
C.10GBase-T
D.10Base-T
