print barcode labels in c# Maintaining Server Availability in Visual Basic .NET

Paint ECC200 in Visual Basic .NET Maintaining Server Availability

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Creating ECC200 In VB.NET
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Maintaining Server Availability
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Lesson Review
Creating DataMatrix In C#
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The following questions are intended to reinforce key information presented in this lesson. If you are unable to answer a question, review the lesson materials and try the question again. You can find answers to the questions in the Questions and Answers section at the end of this chapter. 1. Why is the Available value in the DHCP console s Server Statistics dialog box usu ally not an adequate means of determining whether a DHCP scope s IP address pool is depleted
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2. Which of the following are correct reasons that it is more critical to monitor DNS performance than DHCP or WINS performance a. DNS servers might be accessible from the Internet, and DHCP and WINS serv ers are not. b. DNS servers are more likely to malfunction than DHCP or WINS servers. c. DNS server failures can have an immediate effect on network client performance. d. DNS servers have less effective monitoring tools. 3. What is the best remedy for a disk subsystem that is the bottleneck in a server s performance
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Lesson Summary
Painting DataMatrix In Visual Basic .NET
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Use the Services console to ensure that vital network services are running, and that they are configured with the correct startup type. Check the Event Viewer console to determine why a service might have stopped. Network services such as DHCP, DNS, WINS, and RRAS, have various mechanisms you can use to track their statistics and ongoing activities, including log files, status screens, and performance counters. Server performance degradations are frequently caused by a bottleneck, that is, a slowdown of a key component that prevents the system from performing up to its potential. When looking for the bottleneck on a server, check its four primary subsystems: processor, memory, storage, and network.
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Lesson 3
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Planning a Backup Strategy
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6-31
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Lesson 3: Planning a Backup Strategy
Performing regular backups is one of the most basic functions of the network administrator. Unlike most of the key components in a computer, hard drives have parts that move at high speeds, working at very close tolerances. As a result, hard drive failures are relatively common, and you must prepare for them by regularly saving your data on another storage medium.
Off the Record The most common analogy used to describe the relationship between a hard drive s platters (where the data is stored) and its heads (which read and write data to the platters) is that of a 747 airliner flying at 500 miles an hour, five feet above the ground. When you consider this, it is amazing that hard drives work as well and as long as they do.
After this lesson, you will be able to
Describe the elements of a backup strategy and their functions Understand the difference between full, incremental, and differential backup jobs List the steps involved in creating a backup plan
Estimated lesson time: 30 minutes
Understanding Network Backups
A network backup solution consists of three elements: one or more backup drives, a backup software product, and a backup plan that details the use of the other two items.
Backup Hardware
The storage medium that most administrators choose for backing up their networks is magnetic tape. Magnetic tape drives have high capacities, low media costs, and are a reliable means of long-term data storage. High capacity is a major requirement for a backup medium, because administrators usually like to create unattended backup solutions that can run at night, or while the business is closed. The higher the capacity of the storage device, the fewer times an administrator has to change the medium to complete the backup.
Off the Record Many removable storage devices that would otherwise be acceptable backup media, such as Compact Disk-Recordable drives (CD-Rs) and Zip cartridges, are almost never used for backups, because an administrator would have to hang around the office all night swapping new disks or cartridges into the drive.
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