单项选择题
A. It does not scale well
B. It converges slower than OSPF
C. It is a proprietary protocol
D. It is a distance vector protocol
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?（）
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?（）