单项选择题
Which of the following documents should always be kept up-to-date after any major changes aremade to a network backbone?（）
A. Network diagram
B. Performance baseline
C. Network security procedure
D. Company policy
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Which of the following has a MAXIMUM distance of 300 meters (984 feet)?（）
A.1000Base-T
B.10GBase-SW
C.100Base-FX
D.100Base-TX -
单项选择题
Hardware locks, keypads on entry doors, badge readers, and biometric readers are all examplesof which of the following security types?（）
A.Physical
B.Logical
C.Software
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单项选择题
A crossover cable is MOST commonly associated with which of the following layers of the OSI model?（）
A.Session
B.Application
C.Network
D.Physical
