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application, and Registry entries reflect the application s installation. When the user tries to open an assigned application, it is installed upon demand. You can also publish a Windows Installer application from within Active Directory. A published application becomes available to the user for installation, but is not advertised to the user. The user can locate and install the application by using the Add Or Remove Programs tool in Control Panel. Windows Installer supports Microsoft s .NET framework technology. The .NET framework gives developers code reuse, code specialization, resource management, multilanguage development, improved security, deployment, and administration. Windows Installer also provides software restriction policies that provide virus protection, including protection from Trojan horse viruses and worms propagated through e-mail and the Web. The way you troubleshoot a Windows Installer package depends on the problem you are having. If a Windows Installer package does not install correctly, you need to determine whether the package has become corrupted. To repair a corrupted Windows Installer package, use the Windows Installer repair option. Open a command prompt and type the following command:

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msiexec /f[p][o][e][d][c[][a][u][m][s][v] {package|ProductCode}

For an explanation of the parameters used with the /f switch in the Msiexec.exe command, see Table 3-3.

Planning If you are using the private IP addresses on any network that is protected by ISA Server, you must define a NAT relationship between that network and the Internet. This is because the private IP addresses are not routable on the Internet. In this configuration, only the IP address assigned to the external network adapter on the ISA Server computer is accessible from the Internet so all other addresses must be translated.

Table 3-3

Answers to these questions and explanations of why each answer choice is correct or incorrect are located in the Answers section at the end of the book.

When no relationship is configured between networks, ISA Server drops all traffic between the two networks.

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Description Reinstall only if the file is missing Reinstall if the file is missing or if an older version is installed Reinstall if the file is missing or if an equal or older version is installed Reinstall if the file is missing or if a different version is installed Reinstall if the file is missing or if the stored checksum does not match the calculated value Force all the files to be reinstalled Rewrite all the required user-specific Registry entries Rewrite all the required computer-specific Registry entries Overwrite all the existing shortcuts Run from source and recache the local package

Network Relationship This rule defines a route relationship between the Local Host network and all other networks. This rule defines a route relationship among the Internal network and the Quarantined VPN Clients and the VPN Clients networks. This rule defines a NAT relationship among the internal network, the Quarantined VPN Clients, and the VPN Clients networks and the External network.

There are several additional switches for the Msiexec.exe command. These switches include the ones explained in Table 3-4. In this table, package is the name of the

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ISA Server uses both network rules and access rules to determine whether a client request is passed from one network to another. Together, the network rules and access rules comprise the firewall policy. The firewall policy is applied in the following way: 1. A user using a client computer sends a request for a resource located on another network. For example, a client on the Internal network sends a request to a server located on the Internet. 2. ISA Server checks the network rules to verify that the two networks are connected. If no network relationship is defined between the two networks, the request is refused. 3. If a network rule defines a connection between the source and destination networks, ISA Server next processes the access rules. The rules are applied in order of priority as listed in the ISA Server Management Console interface. If an allow rule allows the request, then the request is forwarded without checking any additional access rules. If no access rule allows the request, the final default access rule is applied, which denies all access.

Windows Installer Package file, and ProductCode is the globally unique identifier (GUID) of the Windows Installer package. For a complete listing of switches, see Help And Support Center.

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Table 3-4

1. You need to find out the degree of fragmentation of a table index. How do you do this A. Use DBCC INDEXDEFRAG. B. Use the sys.dm_db_index_physical_stats DMV. C. Use the sys.indexes catalog view. D. Use the CREATE INDEX Transact-SQL statement with the DROP_EXISTING clause.

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