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+# Unit 6 Introduction to two-tier and three-tier architectures and the internet database environment
+
+## Section 1: Client/Server architectures and database connection to web applications
+
+Read Chapter 8 "Database Application Development":
+
+* client/server architectures
+* databases in a two-tier architecture
+* three-tier architectures
+* web application components
+* databases in three-tier architectures
+* key considerations in three-tier applications
+
+## Section 2: XML and Data Exchange on the Internet
+
+Read Chapter 8: "Database Application Development"
+
+* "Extensible Markup Language (XML)"