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Correct Answers: B A. Incorrect: If no role is assigned, the members of the help desk team will be unable to acknowledge alerts. B. Correct: The ISA Server Basic Monitoring role will allow members of the Helpdesk local user group to acknowledge alerts but will not allow them to view ISA Server 2004 log information. C. Incorrect: Although the ISA Server Extended Monitoring role will enable members of the Helpdesk local user group to acknowledge alerts, it will also allow them to view ISA Server 2004 log information. D. Incorrect: Assigning the ISA Server Full Administrator role to the Helpdesk local user group will mean that the members of that group will be able to view logs as well as perform more important administrative functions such as changing firewall policy.

Review the chapter summary. Review the list of key terms introduced in this chapter. Complete the case scenarios. These scenarios set up real-world situations based on the topics of this chapter and ask you to create a solution. Complete the suggested practices. Take a practice test.

Describe the purpose of an application domain. Write code that makes use of the AppDomain class. Create an application domain. Launch an assembly within an application domain. Unload the application domain.

Figure B 4: TechSmith SnagIt stores its settings in HKCU\Software\TechSmith\SnagIt\5. By far, the most interesting subkey is Microsoft because it contains most of the Windows XP per user settings. This subkey is discussed in detail in "Software\Microsoft\Windows \CurrentVersion," later in this appendix. Other interesting subkeys are Classes and Policies, which I describe in the following sections.

Each high availability technology available in SQL Server 2005 has performance and possibly application implications during a failover. Clustering avoids the application issues because it uses only one instance; however, the instance must restart on another node, thereby causing the data and query caches to be repopulated. Log shipping requires changes to the application to reconnect to the secondary server as well as requiring the data cache and procedure cache to be repopulated. Replication requires application changes to reconnect to a subscriber and has some performance impact because the query cache and part of the data cache would need to be repopulated. Database mirroring, however, does not have caching issues. In addition to sending transactions to the mirror, database mirroring also performs periodic metadata transfers. The purpose of these metadata transfers is to cause the mirror to read pages into data cache. This process maintains the cache on the mirror in a semi-hot state. The cache on the mirror does not reflect the exact contents of the cache on the principal, but it does contain most of the pages. Thus, when the database mirroring session fails over, SQL Server does not have to completely rebuild the cache, and applications do not experience as large a performance impact as they would if you had used the other availability technologies.

Table 8-1

Lesson Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

routable protocol The protocol that supports multipath LAN-to-LAN communications. See also protocol. router A device used to connect networks of different types, such as those using different architectures and protocols. Routers work at the network layer of the OSI reference model. They can switch and route packets across multiple networks, which they do by exchanging protocol-specific information between separate networks. Routers determine the best path for sending data and filter broadcast traffic to the local segment. Routing Information Protocol (RIP) A protocol that uses distance-vector algorithms to determine routes. With RIP, routers transfer information among other routers to update their internal routing tables and use that information to determine the best routes based on hop counts between routers. TCP/IP and IPX support RIP.