TAILIEUCHUNG - Network+ Certification (Outline) - Chapter 16: Network maintenance

Chapter summary: Magnetic tape is the most popular storage medium for backups; backup software enables you to select the data you want to back up and sends it to the device you use for backups; daily backup jobs can be full backups, incremental backups, or differential backups;. | Chapter 16 Network Maintenance 1 Chapter Overview A. Backups B. Antivirus Policies C. Patches and Updates Chapter 16 Lesson 1 Backups 2 1. What Is a Backup A. Backups are copies of data that you make on a regular basis. 1. If a storage device fails or is damaged and the data stored there is lost you can restore it from a backup in a timely manner. B. Even if you have other storage technologies in place that provide fault tolerance such as mirrored disks or a redundant array of independent disks RAID you still need a backup solution. C. Networks both complicate and simplify the process of making regular backups. 1. The process is more complicated because you have data stored on multiple devices that must be protected. 2. The process is simpler because you can use the network to access those devices. D. A network backup strategy specifies what data you back up how often you back it up and what medium you use to store the backups. E. The backup hardware software and administrative policies you will use depend on 1. How much data you have to back up 2. How much time you have to back it up 3. How much protection you want to provide 2. Backup Hardware 3 A. Selecting a backup drive 1. You can use any type of storage device for backups. 2. Try to automate as much of the backup process as possible. 3. Select a device that can store all of your data without frequent media changes. a. You do not need a drive that can hold all of the data stored on all of your network s computers. b. Be selective about which data you want to back up. 1 Determine how much data needs to be protected before you decide on the capacity of your backup device. 4. Consider the speed at which the drive writes data to the medium. 4 5. Backup jobs typically run during periods when the network is not otherwise in use so that all of the data on the network is available for backup. a. The amount of time that you have to perform your backups is sometimes called the backup window. 6. The backup device that .

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