96 Part I EXAM PREPARATION Depending on the
96 Part I EXAM PREPARATION Depending on the implementation, the client s browser may also be considered a tier. If a set of records is sent to the browser by the web server to allow editing on the browser, then the client is considered a tier. In this case, a disconnected recordset or XML data is used for the client s data manipulation. If a round trip to the web server must take place to submit changes and interact with the data, then the client is not considered a tier it is more just a mechanism to display the HTML that is sent by the web server. In this case the user tier is the Internet server that acts as the user and prepares the HTML for display. Internet applications have the best scalability of all application architecture types, meaning that they can support the largest number of concurrent users. The drawback to using an Internet architecture is that it requires a greater number of development skills, and update conflict issues are inherent to the technology. Although an Internet application is usually implemented so that the database can be accessed from anywhere in the world, it can also be used for internal purposes through a configured intranet. Under this principle, users can access the database from a corporate HTML or XML site. Very Large Database Applications SQL Server 2000 has high-speed optimizations that support very large database environments. Although previous versions lacked the capability to support larger systems, SQL Server 2000 and SQL Server 7.0 can effectively support terabyte-sized databases. With the implementation of partitioned views in Enterprise Edition, servers can be scaled to meet the requirements of large Web sites and enterprise environments. Federated server implementations enable a large number of servers to assist in maintaining a complex large system. Elements of the replication system can also help distribute data among a number of machines while providing mutual updatability and maintaining centralized control over the entire system. Third-Party Database Interactions SQL Server 2000 supports heterogeneous connectivity to any data
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