单项选择题
A.Avoiding more expensive bandwidth costs for data lines between regions
B.Avoiding a regional disaster that affects both the main site and the hot site
C.Avoiding a second location that has high latency between sites
D.Avoiding a location that is too expensive
单项选择题 Weekly backups of the system are done on Sundays, and daily backups are done the rest of the week. Which of following backup methods were used if the system crashes on Friday and only requires two backup sets to recover the system?（）
单项选择题 WhichofthefollowingoperatingsystemscanHyper-Vrunon？（）
单项选择题 A SAN attached production file server is required to be backed up nightly according to company policy. Recently the data to be backed up has increased to approximately 4TB. Currently, the server has a single attached LTO2 tape drive. Which of the following should the server administrator do to provide enough backup capacity for the nightly job?（）