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5. Margie tells you that she wants to install new firewalls between all of the Active Directory sites that she has worldwide. She remembers that the original installers had to do something special to the firewalls because they were being used with Active Directory. She cannot remember what that special something was, so she asks if you know of anything. What would you tell her

Figure 1.4 .NET applications and data sources are different worlds. The concepts used in objectoriented programming are different from the concepts used with relational databases and XML.

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6. Margie wants you to determine whether the existing domain controllers are using default or custom ports for replication. How could you determine this

When you capture footage from your camera, Windows Movie Maker deposits the clips in a newly created folder whose name matches the name you assigned to your source file. You ll find the name of the folder at the top of the Collections pane, and you ll see an entry for the folder alphabetically positioned in the Collections tree. (If the Collections tree isn t visible, click Collections on the toolbar.) You don t by any means have to stick with this default scheme. You can create, copy, nest, and delete collections folders to suit your own organizational purposes. The mechanics are simple: To create a new folder at the root level, right-click the entry Collections in the collections tree, choose New Folder, and assign a name to the New Folder item that appears. To create a new folder as a subfolder of an existing folder, start by selecting that folder. To move a folder (for example, to make a root-level folder subordinate to something), drag it and drop it. To copy a folder, right-click and choose Copy. If you paste it at the same level of the tree, Windows Movie Maker will give it the original name plus a sequential number. 820

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Using Windows Movie Maker Remember that the clip objects you work with in Windows Movie Maker are merely pointers to file data, so you can copy them freely without incurring meaningful storage expense. If you find that it makes sense to file a clip in multiple locations, simply create the appropriate folders and copy the clip. (You can also rename the copies individually.) Figure 22-6 illustrates this useful redundancy. Identical Alice in Wonderland and Fiddler clips appear in two places in the tree under Miranda\Plays and in a root-level folder called Theater.

code, and compile-time checks. Still, this can become broken if we start to include malformed SQL queries or XML fragments in our code, none of which are validated by the compiler. A successful solution requires bridging the different technologies and solving the object-persistence impedance mismatch a challenging and resource-intensive problem. To solve this problem, we must resolve the following issues between .NET and data source elements:

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Figure 22-6. You can make your Collections tree as redundant as you please, without adding to your storage burden.

You are a domain administrator for Contoso Pharmaceuticals. You ve noticed that one of your domain controllers is starting to run low on hard disk space. You remove all unnecessary applications and services from the server. You plan to install a couple of additional hard disks in the system as soon as possible. Right now, you just want to clean up as much space as possible on that server, until the new hard disks arrive. You decide to perform an offline compaction of the Active Directory database. This should reduce the size of Active Directory on the hard disk and increase the performance of Active Directory.

To move a clip from one folder to another, drag it from the Collections pane and drop it onto the appropriate entry in the Collections tree. To copy instead of move, hold down Ctrl while you drag.

Before you perform an offline compaction of the Active Directory database on a production server, be sure that you have a current backup of the database.