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ISA Server includes intrusion-detection functionality that monitors for several wellknown vulnerabilities. ISA Server detects intrusions at two different network layers. First, ISA Server detects intrusions at the network layer. This enables ISA Server to detect vulnerabilities that are inherent to the IP layer. Second, ISA Server uses application filters to detect intrusions at the application layer. You can use third-party application filters to add more intrusion detection or create your own application filters using the filter application programming interfaces (APIs) defined in the ISA Server software development kit (SDK).

Exam Tip Because you can create, for example, a mailbox-enabled user or a mail-enabled universal distribution group with a single operation, it is easy to forget that you need to create a public folder and then to mail-enable it. Beware of answers to examination questions that specify that a single command creates and mail-enables a public folder.

Select SQL Server server roles for logins. Specify logins. Specify a SQL Server service authentication mode. Design a secure job role strategy for the SQL Server Agent service. Specify a policy for .NET assemblies. Design security for CLR objects in the database.

A central subscriber topology consists of a single subscriber that has more than one publisher. Changes are written to multiple publishers and then consolidated into a single subscriber, as shown in Figure 11-2. A central subscriber topology is normally used for consolidating multiple databases or as a central reporting database.

Domain Name System (DNS) A service that resolves host names to IP addresses for clients on a network. This service allows users to type a name such as www.microsoft.com instead of an IP address. Dynamic Host Configuration Protocol (DHCP) A service that assigns TCP/IP addresses automatically to clients on a network. DHCP servers provide this service. gateway address A network point that allows access into and out of a network. Gateways can be routers, firewalls, or proxy servers, and gateways decide whether a data packet belongs on the local network or on a remote one. subnet A separate and distinct part of a network, generally represented by one geo graphic location, such as an office or a building. Subnets use gateways to access the Internet, thus allowing all users to access the Internet through one shared network address. subnet mask Subnet masks enable computers to determine when to send packets to the gateway in order to communicate with computers on remote subnets.

To save the data in a DataSet as XML-formatted data, use the WriteXml method of the DataSet. You can save the XML data directly to a file, or you can write it to a stream. Call the WriteXml method of a DataSet to save the contents of all tables in the DataSet as XML or call the WriteXml method of an individual DataTable to write the data from only that table. The following code example saves the data in the NorthwindDataSet to a file named Northwind.xml.

In the query window, modify the Test.Customers table with the following changes:

You have been hired as a consultant by Lucerne Publishing to assist with the deployment of remote access services for company employees. For each of the following, explain how you would configure the required remote access feature. 1. Lucerne Publishing wants to provide special dial-up access for 10 employees. These 10 employees should be authenticated only by verifying that the phone numbers from which they are calling are in fact these employees home phone numbers. The employees should not need to type in a user name and password. How can you implement this configuration

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Correct Answers: C A. Incorrect: This action will export the Enterprise policy. It will not export the firewall policies of an array within the enterprise. B. Incorrect: This action will back up all settings except the system policy settings. To back up the system policy settings, use the Export System Policy task. C. Correct: This action will export the system policy configuration, enabling you to roll it back if something goes wrong. D. Incorrect: This action will export the VPN clients configuration. It will not export the system policy configuration.

To Install the Practice Test and Objective Review 1. Insert the companion CD-ROM into your CD-ROM drive.