Describe the mechanism for sending user data from a web clie

Describe the mechanism for sending user data from a web client (browser) to the middle tier.

Solution

Middle Tier which transfers data from client to the data is also known as Logical Tier ,becuase it recieves the request from the client and passes the request to the data in the form of queries which the data base can understand.The data base then process the request and sends the ouput back to the logical tier which then gives the response to the client in the form of dynamic web pages.

With Server (Apache or IIS) the appropriate action to be taken is identified, such as fetching a file, or passing request to an interpreter. Also it sends an output back to caller in MIME package. As such support for thousands for concurrent users is achieved).

With Server script (example in PHP) interacting with server such as accessing input or generating input is done. It interprets the requests according to business rules and past transactions from this client, and requests appropriate data from the persistence layer. It also computes the derived data and creates HTML (or GIF…) for the page.

The Logical Tier does the following :