单项选择题
A. Network diagram
B. Performance baseline
C. Network security procedure
D. Company policy
单项选择题 Which of the following has a MAXIMUM distance of 300 meters (984 feet)?（）
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?（）
单项选择题 A crossover cable is MOST commonly associated with which of the following layers of the OSI model?（）