how to implement barcode system in c# Lesson 4 Review in Visual C#

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Lesson 4 Review
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1. Your organization has a mixture of Windows 2000 and Windows Server 2003 domain controllers. You have deployed ISA Server 2004 as your firewall solution. Your Internet usage policy states that all users accessing the Internet will be authenticated using Digest authentication. You have configured the properties of the Internal network to require Digest authentication. Now none of your users can access the Internet. How can you correct this problem
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Because you have domain controllers running on both Windows 2000 and Windows Server 2003 servers, your domain cannot be running in Windows Server 2003 mode. Therefore, you must configure the user properties in Active Directory to store the user s password using reversible encryption.
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2. All the clients in your organization are configured as SecureNAT clients. You have created content type elements to prevent users from downloading executables, MP3 and video file types. You use those elements in an access rule and assign it to the All Authenticated Users group. After applying the access rule, you discover that all your clients still have unrestricted access to download the content types. Why can users still download the content types that you are trying to block What should you do to prevent this
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SecureNAT clients cannot be authenticated and therefore the rule will not be applied to anyone. You must assign the rule to the All Users group. The All Users group includes everyone, whether they are authenticated or not.
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Questions and Answers
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3. Your organization has a multiple-domain forest running Active Directory. You support various browser applications including Internet Explorer and Netscape Navigator. All browsing software is configured to use an ISA Server computer as a proxy server. You have configured access rules to allow HTTP and HTTPS traffic for all internal clients, but have not changed any other settings on the ISA Server. Some of your users have Internet access while others are always denied connections. How can you resolve this problem
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Only Internet Explorer can support Integrated Windows authentication. To support Netscape Navigator and other browsing software, you must select a different authentication method, such as Basic or Digest.
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Lesson 5 Review
1. Your Internet usage policy specifies that all users will be allowed full Internet access except that users are not allowed to download any executable files or Visual Basic script files. The IT Administration group is exempted from this restriction. You configure an access rule to prevent the All Users user set from downloading .exe and .vbs file types. Then you create a access rule that allows the IT Administration group to download these files. Then you configure an access rule that allows Internet access for All Users. You soon discover that any user is able to download executable files from the Internet. Why is this happening and how can you change the configuration to meet the company requirements
The problem is in the priority of the rules. If the allow rule for Internet access to All Users is at the top of the list then no other rules will be evaluated and users will have full access. Deny rules or specific allow rules need to be first. The most general rules should be just before the default deny rule. You need to put the allow rule for IT Administration at the top, then the deny rule for .vbs and .exe extensions next, and then the general allow rule for All Users.
2. Your Internet usage policy states that all employees should have full Internet access except that users should not be able to use the ICQ protocol to connect to the Internet. How will you accomplish this
Create an access rule that denies access for All Users from the Internal network to the External network for the ICQ protocol. Then create an access rule that allows full access to the Internet using any protocol. Place the rule blocking the ICQ protocol at the top of the priority list.
3. Your organization has bought a new building and set up new offices in that building. The network in the new building is directly connected to the current network, but all the computers in the new building are on a different subnet, and all the offices in the new building are assigned to one company department that has Internet access requirements different from any other department. You install a new network card on the ISA Server computer and connect it to the network from
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