You have recently been employed as the network administrator for a large pharmaceutical company. On your first day of work, you notice that no backup has been performed for more than six months. You immediately decide to perform a full backup and schedule backups to occur at regular intervals.
You use Windows 2000 Server's Backup Wizard utility to back up a few data files and automate the process to reoccur automatically based on a schedule you construct.
1: | What is the minimum number of disks required for a RAID 5 array?
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A1: | d. At least three hard disks are required in a RAID 5 array. None of the other answers are valid. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
2: | What RAID level uses disk mirroring to provide fault tolerance?
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A2: | a. Disk mirroring is defined by RAID 1. Raid 0 is disk striping, which offers no fault tolerance. RAID 5 is disk striping with parity. RAID 2 is not a commonly implemented RAID level. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
3: | Which of the following backup methods require the archive bit to be cleared? (Choose the two best answers.)
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A3: | a, b. The archive bit is reset in both a full backup and an incremental backup. Differential backups do not change the status of the archive bit. Mirror image is not an accepted backup type. For more information, see the section “Disaster Recovery,” in this chapter. |
4: | As network administrator, you have been asked to implement a backup and restore method that requires only a total of two tape sets. Which of the following backup pairs would you use?
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A4: | c. A full backup combined with a differential backup will require only two tapes to do a complete restore, assuming that each backup set fits on a single tape. Full and incremental backups might need more than two tapes. Differential and incremental backups must be combined with a full backup to be effective. Answer d is not valid. For more information, see the section “Disaster Recovery,” in this chapter. |
5: | Which of the following are valid ways to assign computers to a VLAN? (Choose the three best answers.)
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A5: | a, b, d. VLANs can be created by using protocol assignments, by defining the ports on a device as belonging to a VLAN, or by using MAC addresses. VLANs cannot be created by using the NetBIOS computer name. For more information, see the section “VLANs,” in this chapter. |
6: | How many hard disks are required to establish a RAID 1 solution?
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A6: | d. Two disks are required to create a RAID 1 array. All the other answers are invalid. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
7: | You are the network administrator for a company that operates from 7 a.m. to 9 p.m. Monday through Friday. Your boss requires that a backup be performed nightly but does not want the backup to interfere with network operations. Full backups have been started at 9:30 p.m. and have taken until 8 a.m. to complete. What strategy would you suggest to correct the backup issue?
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A7: | b. By making a full backup on the weekend and incremental backups during the week, you should be able to complete the backups without interfering with the normal working hours of the company. All the other answers are invalid. For more information, see the section “Disaster Recovery,” in this chapter. |
8: | Which of the following power-related problems is associated with a short-term voltage drop?
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A8: | c. A sag is a short-term voltage drop. A brownout is also a voltage drop, but it lasts longer than a sag. A surge is an increase in power that lasts a few seconds. A spike is a power increase that lasts a few milliseconds. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
9: | Which of the following fault-tolerant RAID levels offers the best read and write performance?
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A9: | d. RAID 10 offers the performance advantages of RAID 0 and the fault-tolerance capabilities of RAID 1. RAID 0 is not a fault-tolerant solution. RAID 1 and RAID 5 offer fault tolerance but do not increase performance. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
10: | Which of the following are fault-tolerance measures associated with network adapters? (Choose the two best answers.)
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A10: | a, b. In server systems, warm swapping allows network adapters to be swapped out without the server being powered off. Adapter teaming allows multiple NICs to be logically grouped together. If one of the NICs fails, then the other NICs in the group can continue to provide network connectivity. Adapters in a team can also be grouped together to increase the available bandwidth. Answers c and d are not valid answers. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
11: | Which of the following devices cannot be implemented in a fault-tolerant configuration?
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A11: | d. There is no accepted fault-tolerance strategy for coping with a failed memory module. All the other hardware components listed can be implemented in a fault-tolerant configuration. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
12: | What is the storage capacity of a RAID 1 array that uses two 40GB hard disks?
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A12: | c. A RAID 1 array requires an amount of disk space equivalent to that of the mirrored drive. Therefore, in a RAID 1 array of 80GB, only 40GB will be available for data storage. None of the other answers are valid. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
13: | Which of the following are valid reasons to use a UPS? (Choose the three best answers.)
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A13: | a, b, d. UPSs can prevent damage to hardware and damage to data caused by fluctuations in the power supply. They can also promote the availability of data by keeping a server running in the event of a power outage. A UPS does not increase the speed of the network. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
14: | How many tapes are typically used in a GFS tape rotation?
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A14: | c. The standard GFS rotation uses 12 tapes. None of the other answers are valid. For more information, see the section “Disaster Recovery,” in this chapter. |
15: | As a network administrator, you have been asked to implement a RAID solution that offers high performance. Fault tolerance is not a concern. Which RAID level are you likely to use?
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A15: | a. RAID 0 offers the highest level of performance but does not offer any fault tolerance. If the performance of RAID 0 is required along with fault tolerance, RAID 10 is a better choice. RAID 1 offers fault tolerance but no increase in performance. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
16: | What is the best way to verify that your backup procedures are working?
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A16: | b. Performing periodic test restores is the only way to be absolutely sure that your backup and restore procedures and systems are working correctly. All the other options are best practices, but doing a test restore is the only way to be sure that the backups are working. For more information, see the section “Disaster Recovery,” in this chapter. |
17: | What file system access protocols are commonly supported by a NAS device?
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A17: | b, c. NAS devices typically support NFS and SMB file system access protocols. NTFS and FAT are file systems, not file system access protocols. For more information, see the section “NAS,” in this chapter. |
18: | Which of the following uses redundant hard disk controllers?
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A18: | a. Disk duplexing is an implementation of RAID 1 (disk mirroring) that places each of the drives on a separate controller. None of the other answers are valid. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
19: | You have installed five 15GB hard disks for your server in a RAID 5 array. How much storage space will be available for data?
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A19: | b. In a RAID 5 configuration, a space equivalent to one whole drive is used for the storage of parity information. In this question, this requirement equates to 15GB. Therefore, in a 75GB RAID 5 array, 60GB is available for data storage. None of the other answers are valid. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
20: | While digging through an old storage closet, you find two 10GB hard disks. What RAID levels could you implement with them? (Choose the two best answers.)
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A20: | b, d. Both RAID 0 and RAID 1 use two disks. The difference between the two implementations is that RAID 1 offers fault tolerance through disk mirroring, whereas RAID 0 stripes the data across the drives but does not offer any fault tolerance. RAID 5 requires at least three disks, and RAID 10 requires at least four disks if the entire hard disk is to be used. For more information, see the section “Understanding Fault Tolerance,” in this chapter. |
1. Toigo, Jon William . Disaster Recovery Planning: Preparing for the Unthinkable, third edition. Prentice Hall, 2002.
2. Overview of disaster recovery procedures, www.labmice.net/disaster.htm.
3. Disaster recovery information for Windows 2000, www.microsoft.com/windows2000/library/operations/fileandprint/recovery.asp.
4. General disaster recovery information, www.tekcentral.com/teknetwork/disaster_recovery.