web-server web-server How do web servers communicate with databases?

web-server What is HTTP? What is HTTPd? What web server software is available for Microsoft Windows NT? Is HTTP software available for other platforms? Can I use one computer to serve several webs? What are Server Side Includes (SSI)? What are ISAPI. NSAPI and WSAPI? What is FastCGI? What are Active Server Pages (ASP)? What is an application server? How do web servers communicate with databases? If security is such a big deal on webs, why doesn't this FAQ talk more about it?

Web applications are multi-tiered, so they use data access technologies familiar to designers of client/server systems: ODBC native connectors JDBC several techniques based on Microsoft OLE-DB. A web server can connect with these services via any of the application technologies described above, such as CGI or NSAPI. For example, a data-driven web application could consist of a CGI script written in oraperl, an open source Perl extension that enables direct manipulation of Oracle tables. A special consideration arises because HTTP is a stateless protocol; it sets up a new connection for each client request. To offset this performance-killing limitation web developers are forced to employ a number of workarounds such as connection pooling and result caching. Future versions of HTTP will probably support state, simplifying Internet application design.