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Chances are that if you deal with enterprise-level systems management you ll need to deploy systems en masse from time to time If you have a hardware refresh rate of, say, 25 percent per year and a total of 10,000 computers, you ll have to deploy 2,500 machines every year The tasks involved in the process are usually repetitive, lending themselves to batch processing As a result, you can----and should----put solutions in place that let you automate deployment of systems on an ongoing basis If planned properly, you can extend the file sets and tools you develop, using them to provide everyday troubleshooting capabilities For example, suppose a problem is resident on only one computer, but the symptoms present themselves across multiple users Many IT departments have a policy of simply reimaging such systems, on the assumption that the computer in question has somehow varied from an approved image.

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Access GPS and other LBS resources Access and modify media files Access data from calendar, contacts, tasks, and memos Make voice calls, receive voice calls, read phone logs Access data from calendar, contacts, tasks, and memos Access microphone, camera, or screen capture Capture screenshots

This may seem counter intuitive, and an entry-level troubleshooting technique, however while it may technically satisfying to isolate an issue on a machine, doing so may be take much more time than simply reimaging a system In this way, the user has less down time because you have cloned the same configuration on to all machines, so if an issue only presents on one, the chances of it being systemic are low In most organizations, reimaging as part of a troubleshooting paradigm can sharply reduce the Total Cost of Ownership (TCO) while simultaneously serving to keep the environment as homogenous as possible (which further reduces TCO).

Web application frameworks have gone to great extents to solve the HTTP POST problem. You need to look no further than the ASP .NET framework to see the complexity involved in making sure that the Browser Back or Refresh buttons don t cause a mountain of problems with respect to the server-side state. ASP.NET is not to be blamed, because its creators were trying to fit a dynamic architecture into an old static Web infrastructure. You can solve the HTTP POST problem elegantly using the XMLHttpRequest object. The idea behind using XMLHttpRequest is to POST the data before the next page is loaded, as Figure 8-4 illustrates.

To reduce the time spent reimaging, it s a good idea to keep user data in sync with or stored on another host or segmented from the system in some fashion, such as a dedicated partition for user data, or utilizing Apple s external account technology In Microsoft Windows, this would commonly be accomplished using roaming profiles In the Apple enterprise vernacular, there are two similarly common options for user data storage, Portable Home Directories and Network Home Folders This helps save your support personnel from either having to back up each user folder or computer prior to reimaging or replacing a system One of the goals of implementing an imaging solution should be to reduce the amount of time spent fixing problems Commoditizing computers will help you to achieve that goal In 7, we ll cover portable and network home folders..

Provide themes Connect through USB Make Wi-Fi connections and collect data about Wi-Fi configuration