Summary

In this lesson, the following has been discussed

There are different tier architerures, 1-ties, 2-tier, 3/N-tier.

		In 1-tier architecture all three layers are on the same machine, all code and processing kept on a single
		machine, the three layers are tightly connected, moving to a new machine may mean rewriting everything,
		changing one layer requires changing other layers.

		In 2-tier architecture also known as "client-server" architecture, database runs on server separated, the
		server cannot respond to multiple requests at the same time.

		In 3/N-tier architecture, each tier is completely independent from all other tiers; N-tier architectures usually
		have at least three separate logical parts, Maintainability, Scalability, Flexibility and Availability.

Client-side technologies (JavaScript, Ajax, JQuery, JSON).

Server-side technologies (CGI, PHP, ASP).

Servlet is the Java term for CGI application.

JSP is what happened when somebody introduced Java to HTML.