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Configuring and Managing Remote Network Connectivity (6.0)
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Correct Answers: A, C, and D A. Correct: To use RSA SecurID authentication, an ISA Server 2004 computer must be configured as an RSA ACE/Agent. B. Incorrect: To use RSA SecurID authentication, client computers need not be configured as RSA ACE/Agents. C. Correct: Not only does the ISA Server 2004 computer need to be configured as an RSA ACE/Agent; it must also have access to the RSA SecurID server, typically installed on the Internal network. D. Correct: Once the ISA Server 2004 computer is configured as an RSA ACE/Agent and is allowed access to the RSA SecurID server, you must enable this form of authentication by entering the RSA SecurID server in the EAP Providers dialog box. E. Incorrect: There is no need to disable MS-CHAPv2 as an authentication method to enable RSA SecurID as an authentication method.
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Correct Answers: C, D, and E A. Incorrect: CAs are not required to implement ISA Server 2004 Quarantine Control. B. Incorrect: An RSA SecurID server is not required to implement ISA Server 2004 Quarantine Control. C. Correct: The listener component listens for messages from quarantine-compatible remote access clients that indicate that their scripts have been run successfully. D. Correct: VPN clients must have a quarantine-compatible, remote-access client that is configured with the appropriate Connection Manager quarantine profile. Connection Manager is an add-on component to Windows Server 2003 that can be downloaded from Microsoft s Web site. E. Correct: The client-side quarantine script performs a series of checks on the remote-access client s configuration to ascertain whether it is safe to move the client off the quarantine network to the VPN clients network. Such checks could include whether the client s antivirus definitions are up-to-date. Once the script has executed correctly, RQC.EXE sends the successful notification to the listener installed on the ISA Server computer.
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Objective 6.2
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Configure ISA Server 2004 as a Remote-Access VPN Server
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18-19
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Correct Answers: A A. Correct: According to the graphic, users in the Existentialists, Nihilists, and Philosophers groups will be exempt from the quarantine-control process. B. Incorrect: According to the graphic, clients who do not have appropriately configured Connection Manager profiles or clients whose script does not validate an appropriate configuration will be disconnected from the VPN server after 90 seconds, rather than 60 seconds. C. Incorrect: According to the graphic, quarantine occurs according to ISA Server policies rather than RADIUS server policies. Although RADIUS may be used for authentication of users, it is not a necessity, given this configuration. D. Incorrect: According to the graphic, quarantine occurs according to ISA Server policies. Nothing is stated about requiring RSA SecurID authentication in this instance.
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18-20
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Configuring and Managing Remote Network Connectivity (6.0)
Objective 6.3
Diagnose and Resolve VPN Connectivity Issues
VPN connections can fail for a variety of reasons. If the routing between the Internal and remote networks is incorrectly configured, traffic will not cross the VPN link. If the correct CA is not trusted, connections that require certificates for authentication will not be established. In some cases, enabling network security options such as dropping IP fragments, commonly used in attacks such as the teardrop attack, will mean that certain VPN connections cannot be established because the two endpoints cannot authenticate against each other. Even when VPN connections are successfully established, it is important to know which tunneling protocols natively support name resolution and which protocols require extra DNS configuration for resolution of host names on the remote network.
Objective 6.3
Diagnose and Resolve VPN Connectivity Issues
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Objective 6.3 Questions 1.
For the last 12 months, your headquarters has been connected to a remote branch office using a site-to-site VPN link. All hosts at the branch office use the DNS suffix branch.contoso.com. All hosts at the headquarters office use the DNS suffix hq.con toso.com. Each location has its own separate DNS server. For the last 12 months, clients have been able to access servers on the remote branch-office network using both fully qualified domain names (FQDN) and IP addresses. In the last week you have upgraded the site-to-site VPN link from PPTP to IPSec tunneling mode because PPTP did not provide several features that you required, such as data integrity and origin authentication. Since the switch to IPSec tunneling mode, clients at the headquarters site have been unable to access branch-office servers using FQDN, though they are accessible using IP address. What can you do to resolve this situation (Choose the best answer.) A. Configure the headquarters DNS to use conditional forwarding to forward all queries made to the branch.contoso.com zone to the DNS server at the branch office. B. Configure the branch-office DNS server to act as a secondary server to the primary zone, which is stored on the headquarters DNS server. C. Issue an IPSec certificate to the branch-office DNS server. D. Issue an IPSec certificate to the headquarters DNS server. E. Configure the headquarters DNS server with a remote-access VPN connection to the branch-office network.
You are the network administrator for A. Datum Corp. You have configured two IPSec tunnel-mode, site-to-site VPN connections to two partner organizations. The first partner organization uses the zone name tailspintoys.internal for hosts on its Internal network. The second partner organization uses the zone name contoso.internal for hosts on its Internal network. All organizations use Windows Server 2003 as their DNS servers and have ISA Server 2004 configured as their Internet-edge firewall. You want to ensure that hosts on the A. Datum Internal network can resolve host names on the Tailspintoys and Contoso Internal networks. Which of the following methods would work (Choose all that apply.) A. Configure conditional forwarding for the partner zones on the A. Datum DNS server. B. Configure stub zones for the partner zones on the A. Datum DNS server. C. Configure the A. Datum DNS server as a root server. D. Configure secondary zones of the partner zones on the A. Datum DNS server. E. Configure the partner zones as Active Directory Integrated zones and ensure that they replicate to all domain controllers within the forest.
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