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store it in the local computer store. In this method, each computer must separately request a computer certificate from the CA. You must have administrator permissions to install a certificate using Web enrollment. This is the option that works best for mixed operating system environments. Based on the certificate policies in your organization, you need to perform only one of these methods. However, depending on the operating system deployment of your organization and whether or not Windows XP is the primary desktop in your enterprise, a combination of these choices works best. Have auto-enrollment for Windows XP and Windows Server 2003 active through Active Directory, and for all other operating systems offer Web enrollment options. Make sure to properly authorize access to the Web enrollment site and use Secure Sockets Layer (SSL) encryption to keep the conversation private even to keep it internal to your network. You don t want a malicious user on your intranet obtaining someone else s certificates and identity.

Correct Answers: B A. Incorrect: This counter indicates the total number of successful incremental zone transfers received by a secondary DNS server. In this scenario, the sus pected replication problem is between domain controllers hosting Active Directory integrated primary zones. The question does not mention secondary zones.

The big advantage of having structured the data comes in sections of code that bear no logical relation to the title field. Sometimes programs have statements that refer conceptually to a collection of data rather than to individual components. In such cases, individual components such as the title field are referenced merely because they are part of the collection. Such sections of code don t have any logical reason to work with the title field specifically and those sections are easy to overlook when you change title. If you use a structure, it s all right to overlook such sections because the code refers to the collection of related data rather than to each component individually.

14-34

Implementing, Managing, and Maintaining Name Resolution (2.0)

Pointer usage is one of the most error-prone areas of modern programming. It s error-prone to such an extent that modern languages including Java and Visual Basic don t provide a pointer data type. Using pointers is inherently complicated, and using them correctly requires that you have an excellent understanding of your compiler s memory-management scheme. Many common security problem, especially buffer overruns, can be traced back to erroneous use of pointers (Howard and LeBlanc 2003). Even if your language doesn t require you to use pointers, however, a good understanding of pointers will help your understanding of how your

Previously, we configured the calling router to use EAP-TLS in its negotiations. Now we have to configure the answering server with the matching option as well. To configure EAP-TLS authentication on the answering router:

B. Correct: In Active Directory integrated zones, resource record replication is part of Active Directory replication. Replication Monitor is a Windows Server 2003 support tool used to monitor and debug this process. C. Incorrect: The DNS server event log records such system events as failure of the DNS Server service to start. This tool is not appropriate to use in this scenario. D. Incorrect: Automatic query testing performs periodic simple and recursive tests on the server, which test name resolution. Although name resolution failures can occur because of faulty replication, this procedure does not specifically test Active Directory replication.

Correct Answers: C A. Incorrect: This approach creates an empty root zone and makes the internal server a root server. It would then never use forwarders and would resolve only internal queries. This approach is not a solution to this problem, although it could be a cause. B. Incorrect: This approach enables IP-address-to-host-name resolution, but it does not solve the current problem. C. Correct: The DNS server is either unable to access a forwarder, or it is not configured with forwarders. One possible cause is corruption or deletion of the root hints file. Copying the sample root hints file to the root hints file could fix this problem. D. Incorrect: This approach exposes A. Datum Corporation s internal zone to attacks through the Internet.

programming language works, and a liberal dose of defensive programming practices will help even further.

Correct Answers: D A. Incorrect: You can set up an input or view filter in Network Monitor that speci fies traffic from a particular IP address. You can also specify a filter based on pattern match. (Request packets are characterized by the QR bit being set to 0 in the DNS message header.) However, this task is not easy and requires excessive administrative effort. B. Incorrect: The Netdiag utility helps to isolate networking and connectivity prob lems. It does not log packets on the network. C. Incorrect: This tab lets you perform simple and recursive tests: either single tests or periodic tests. It does not monitor network traffic. D. Correct: The Debug Logging tab lets you define the packets you want to log. You can specify packet direction, content, and type. You can enable filtering based on IP address. Server debug logging can be resource-intensive, and you should enable it only when you need detailed information about server traffic.