An administrator is implementing a new data retention program for the company. Which of the following is the MOST important consideration as the new program is created？ （）

单项选择题Whenmakingchangestoaserver，whichofthefollowingistheBESTwaytotroubleshoota problem？（）

A. Perform root cause analysis and then test the theory to determine the cause.
B. Make changes to the system and document everything once the problem is resolved.
C. Make multiple changes to all affected areas to resolve all potential issues.
D. Make a change and if the problem is not resolved， reverse the change.

单项选择题Anadministratorisattemptingtorecoverfromapowerfailureinthedatacenter.Whichofthe followingistheBESTwaytorecovertheservers？（）

A. Bring up the WINS server， the DNS server， then the web server
B. Bring up the web server， the time clock server， then the DHCP server
C. Bring up the backup tape server， the DNS server， then the web server
D. Bring up the active directory server， the DNS server， then the web server

多项选择题Whichofthefollowingaretypesofbiometricdevicesusedinserverrooms？（）

A. Mantraps
B. Fingerprint scanners
C. CCTV systems
D. Retina scanner
E. Proxy card readers

单项选择题Whichofthefollowingisawaytoprotectserveroperatingsystemsfromashorttermcontractor？（）

A. Biometric devices
B. Limited logon hours
C. Mantraps
D. Rack doors

多项选择题Whichofthefollowingareexamplesofphysicalsecuritymeasures？（）

A. Policies and procedures
B. Encryption
C. Locked doors
D. Security personnel
E. Backup tapes