多项选择题
Which of the following are types of biometric devices used in server rooms？ （）
A. Mantraps B. Fingerprint scanners C. CCTV systems D. Retina scanner E. Proxy card readers
单项选择题 Whichofthefollowingisawaytoprotectserveroperatingsystemsfromashorttermcontractor？（）
多项选择题 Whichofthefollowingareexamplesofphysicalsecuritymeasures？（）
单项选择题 WhichofthefollowingistheBESTsupportchannelforserversoftwareandhardware？（）
