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The next step in assessing resources and designing network segmentation is determin ing resource needs. Review and document which resources need to be accessed by whom so that you can make an informed decision about which resources should be further protected. Guidelines for determining resource needs are as follows:

To verify operation of the directory services restore mode boot option, complete the following steps: 1. Restart your computer and press F8 when you see the Boot menu. 2. On the Windows Advanced Options menu, use the arrow keys to select Directory Services Restore Mode, and then press Enter. 3. The Boot menu is displayed again, with the words Directory Services Restore Mode displayed in color at the bottom. Select the operating system installation that you want to start, and then press Enter. The computer restarts in directory ser vices restore mode. This can take a few minutes. 4. On the Welcome To Windows screen, press Ctrl+Alt+Delete. Log on to the local computer using the server s Administrator account name (specified during server setup) and directory services restore mode administrator password (specified dur ing Active Directory installation). Click OK.

heuristic decisions to both roll back and commit the transaction; that is, some resources decided to roll back and others decided to commit.

Use the same principles for determining overall resource needs as you do for determining who should have access to a single server. That is, employees should not be able to access anything that is not necessary to their jobs; partners should not be able to access anything not specifically designated as available to them; and the public should be limited to information the organization wants them to have. Express logical barriers via the acquisition and management of physical controls. The decisions about what hardware, software, or other protection is needed, as well as when and where it is needed, depend on the resource that needs protection and where it must be placed. For example, the root Certification Authority computer for the organization should be protected by many physical borders that is, placing it in a vault, taking it offline, restricting access to it to a limited number of employees, and placing its keys in a secure physical device. On the other hand, ordinary printers should be conveniently located in rooms on every floor.

You cannot use the name and password of the Active Directory administrator because Active Directory is offline and account verification cannot occur. Rather, the SAM database is used to control access to Active Directory on the local computer while Active Directory is offline.

5. In the Windows Is Running In Safe Mode warning message box, click OK to run the domain controller in safe mode. 6. To return to normal Active Directory operation, restart the computer.

After you have determined resource needs, you are ready to begin classifying data. Fol low these guidelines for classifying data:

rollback() The rollback() method is invoked to roll back the transaction and undo updates. The rollback() method can throw one of three different checked exceptions. A SecurityException is thrown if the thread using the UserTransaction object is not allowed to roll back the transaction. An IllegalStateException is thrown if the current thread is not associated with a transaction. A SystemException is thrown if

In this practice, you verify Active Directory installation on the domain controller you created in Lesson 2.

Investigate and document exactly what the terms public data and private data mean for your organization. When you clearly understand these terms, the need for separating the internal network into areas of trust might become more obvious, and the need for stronger protection on the natural borders between company and public and between company and partner might become more distinct. For exam ple, Tailspin Toys might want current product information to be available to the public to encourage them to buy its products, but the company does not want to expose information on any unique manufacturing processes, customer lists, material sources, financial information, employee data, and so forth. A bank or a hos pital will have information that must be made public by law, as well as strict regulations on how it must control access to other information. Identify and catalog data by its level of sensitivity. This guideline supports the development of boundary controls that match data classification levels. For exam ple, data classified as public data can be placed on a public Web site. On the Web site, you will provide controls to protect the data from unauthorized modification