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Answers to these questions and explanations of why each choice is right or wrong are located in the Answers section at the end of this book.
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1. What is the connection string s key/value pair for using Windows Authentica tion in SQL Server 2000 and SQL Server 2005 (Choose all that apply.) A. Integrated security = yes B. Integrated Security =SSPI
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Lesson 6: Securing Sensitive Connection String Data
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C. Integrated Security = True D. Trusted_Connection = Yes 2. If you must use a user name and password to connect to a database, where should you store the sensitive information A. Compiled in the application B. In an encrypted application configuration file C. In a resource file deployed with the application D. In the registry 3. What is the recommended method for securing sensitive connection string information A. Encrypting the data in the application configuration file B. Using a code obfuscator C. Using integrated security (Windows Authentication) D. Querying the user for his or her credentials at run time
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5 Review
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To further practice and reinforce the skills you learned in this chapter, you can per form the following tasks:
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Review the chapter summary. Complete the case scenarios. These scenarios set up real-world situations involv ing the topics of this chapter and ask you to create a solution. Complete the additional practices. Take a practice test.
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Summary
Connection objects are created by setting a valid connection string and enabling communication between your application and a data source. ADO.NET provides four primary connection objects that can be used to connect to almost any stan dard database. Connection objects contain several properties, methods, and events that are used for opening and closing connections to a data source, providing informa tion regarding the current state of the connection and surfacing warnings and informational messages from a data source. Connection objects enable connection pooling by default. By setting connec tion pooling specific connection string keywords, you can control how connec tions interact with the connection pool. By wrapping connection calls in a try-catch block, you can process errors returned from SQL Server by using the SqlException and SqlError classes. By using Windows Authentication and application configuration files, you can protect sensitive information such as passwords in your programs.
Key Terms
Do you know what these key terms mean You can check your answers by looking up the terms in the glossary at the end of the book.
connection object connection string
5 Review
connection pool encryption integrated security
Case Scenarios
In the following case scenarios, you will apply what you ve learned about configuring connections and connecting to data. You can find answers to these questions in the Answers section at the end of this book.
Case Scenario 1: Troubleshooting a SQL Connection
You just landed a sweet job at the Alpine Ski House and have been assigned to main tain the application that keeps track of inventory in the ski rental hut. The client appli cation connects to a SQL Server database where the inventory data is stored. You decide to test the application before the season begins, and the first time you run the application and try to check inventory, you get an unhandled exception originating from the SQL server. How can you modify the application so that users can better identify and trouble shoot connection problems
Case Scenario 2: Securing Sensitive Data
You are working as an application developer at Contoso Pharmaceuticals and have been tasked with rewriting their in-house research and development application. The first thing you notice is that they store user name and password information in plain text within the application code base. Create a list of suggested remedies to present to upper management.
Suggested Practices
To gain further knowledge on the subject of working with connections, complete the following practices.
Practice 1
Create an application that targets different databases, which can be selected when the application starts. Design a reusable block of code that can be used to handle SQL Server errors of any severity.
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