单项选择题
Which of the following types of DNS records enables support for email?（）
A. A
B. MX
C. PTR
D. AAAA
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相关考题
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单项选择题
Wheninstallingaserverinarack，whichofthefollowinglocationsdescribeswhereintheracka servershouldbeinstalled？（）
A.On the very bottom U of the rack， with the UPS above the server
B.In the middle of the rack to help balance the rack
C.Closest to the bottom of the rack， above heavier equipment
D.On the very top U of the rack， with the UPS directly below it -
单项选择题
Which of the following backup methods should be used nightly to ensure backups capture all necessary data in the LEAST amount of time?（）
A. Daily
B. Incremental
C. Normal
D. Differential -
单项选择题
An administrator needs to update the anti-virus， security patches， BIOS， and the web server software on a production system. Which of the following is the BEST method to accomplish this？（）
A. Update anti-virus， security patches， BIOS software， and then the web software.
B. Update the web software， security patches， anti-virus， and then the BIOS.
C. Update security patches， BIOS， web software， and then the anti-virus.
D. The order does not matter， only one change at a time should be done.
