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11.    E. A surge protector provides only a basic level of protection against specific power overage problems. It won’t protect a server against power underage (sags, brownouts, blackouts) problems.

12.    D. A brownout occurs when the power dips below standard levels for several seconds and then returns to normal level.

13.    D. A spike is an extremely short increase in power that is immediately followed by a return to normal voltage levels. It gets its name because a graph of this condition looks like a spike.

14.    A. A full backup will clear the archive bit on every file it backs up.

15.    E. A differential backup uses a full backup and a daily backup that backs up everything that has changed since the last full backup. When a restore needs to happen, only two tapes will be used.

16.    E. An incremental backup backs up the files that have changed since the last full or incremental backup. Each time an incremental backup backs up files, it clears the archive bit.

17.    B. Because you are restoring only a single backup session, it doesn’t take as long as it would if you had to restore from either a differential or incremental where you have, at the very least, two sessions or more.

18.    D. At the time of the writing of this book, Digital Linear Tape (DLT) has the highest capacity (hundreds of gigabytes) of those backup tape technologies listed.

19.    C. Because new viruses are introduced often (approximately once or twice a month), the generally accepted guidelines are to update the virus definition files for your antivirus software approximately once a month.

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