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Another way of representing the quality of predictions is through a classification matrix. A classification matrix shows actual values compared to predicted values. Figure 9-15 shows the classification matrix for the predictive models from Lesson 1. There are four matrices, one for each model. The rows show the predicted values, and the columns show the actual values. For the Decision Trees algorithm, for example, you can calculate from the first row that the algorithm predicted 2,510 buyers (744 + 1,766). Of these

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By default, if a computer is a member of a workgroup, Windows XP Professional uses the Welcome screen to allow users to log on locally, as shown in Figure 1-6. To log on, click the icon for the user account you want to use. If the account requires a password, you are prompted to enter it. If the account is not password-protected, you are logged on to the computer. You can also use CTRL+ALT+DELETE at the Welcome screen to get the Log On To Windows dialog box. This dialog box enables you to log on to the Administrator account, which is not displayed on the Welcome screen when other user accounts have been created. To use CTRL+ALT+DELETE, you must enter the sequence twice to get the logon prompt.

6. On the Report Period page, specify the start and end dates for the report. Click Next. 7. On the Report Publishing page, you can choose to publish reports to a directory. If you choose this option, the report will be generated and then copied to the specified directory. You can also specify the name that will be used to write the report to the directory. If you do not choose this option, the report will be listed in the ISA Server Management console, and stored on the ISA Server computer. 8. On the Send E-Mail Notification page, shown in Figure 11-16, you can configure an e-mail address and SMTP server. If you choose this option, an e-mail will be sent to the recipient notifying the recipient that the report has been generated. You can also include a link to the report if you published the report to a directory.

The Dashboard view in ISA Server Management Console displays a summary of the information that is available for real-time monitoring in ISA Server. The interface is shown in Figure 11-1. Most of the nodes in the Dashboard display a summary of the information that is available on the other views under the Monitoring node. The Dashboard nodes are described in Table 11-2.

You can view conflict data using the Microsoft Replication Conflict Viewer. Conflict data is stored until the end of the conflict retention period, which defaults to 14 days. You can alter the conflict retention period by specifying a retention value for the @conflict_retention parameter of the sp_addpublication stored procedure.

Check DNS name resolution If the client cannot resolve the DNS name of the Internet resource, the client will not be able to connect to the resource To check if the client can resolve the DNS name, ping the FQDN of the Internet resource Even if you can not ping the server, you can use the ping to determine if the client resolved the FQDN to the correct IP address If the client did not resolve the DNS name correctly, then check the client DNS configuration and the DNS server used by the client Also check the access rules on ISA Server to ensure that DNS queries from the internal network can be forwarded to the Internet DNS servers Determine the extent of the problem An important troubleshooting step is to attempt to identify the cause of the problem by isolating who is affected by the problem.