70-306 Developing and Implementing Windows-based Applications with Microsoft Visual Basic .NET
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Demo Question 2.
Your company, EliteCertify.com, is a nationwide webhosting service provider that allows other companies to resell their services. You are currently working on a set of Web services that will allow these resellers to manage different aspects of the webhosting service. Although your Web services will not be online for another five months, several resellers want to begin developing applications based on your specifications. What should you do to allow these resellers to begin developing their applications? (Select the best choice.)
A. Open your corporate firewall to allow DCOM traffic to pass through.
B. Use Wsdl.exe to generate proxy classes for your exposed Web services. Send these proxies to your resellers.
C. Send to the resellers the application configuration files that are associated with the Web services.
D. Allow the resellers to download the source code of your Web services.
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Answer: B
To allow the resellers to begin developing their web hosting application, you should use
the Web Services Description Language Tool, or Wsdl.exe, to generate proxy classes for
your exposed Web services and send the proxies to your resellers. Wsdl.exe can generate
proxy classes that enable programmers to more easily code against your Web services.
Allowing the resellers to download the source code of your Web services could make
trade secrets available to the public. In addition, resellers might not have the necessary
components to easily use your source code. Opening the firewall to allow DCOM traffic
is a serious security risk, and it does not contribute to the solution. The application
configuration files associated with the Web services do not contain the information
necessary to assist an application developer in writing applications for the Web services.
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