0
Still curious? Ask our experts.
Chat with our AI personalities
Ezra
Fran
RossAdd your answer:
Earn +20 pts
Difference between Two tier architecture and Three?
The easiest way to explain this is, as you suggest, by an example. So I'll give you an example. Let's suppose I'm going to write a piece of software that students at a school can use to find out what their current grade is in all their classes. I structure the program so that a database of grades resides on the server, and the application resides on the client (the computer the student is physically interacting with). When the student wants to know his grades, he manipulates my program (by clicking buttons, menu options, etc). The program fires off a query to the database, and the database responds with all the student's grades. Now my application uses all this data to calculate the student's grade, and displays it for him. This is an example of a 2-tier architecture. The two tiers are: 1. Data server: the database serves up data based on SQL queries submitted by the application. 2. Client application: the application on the client computer consumes the data and presents it in a readable format to the student. Now, this architecture is fine, if you've got a school with 50 students. But suppose the school has 10,000 students. Now we've got a problem. Why? Because every time a student queries the client application, the data server has to serve up large queries for the client application to manipulate. This is an enormous drain on network resources. So what do we do? We create a 3-tier architecture by inserting another program at the server level. We call this the server application. Now the client application no longer directly queries the database; it queries the server application, which in turn queries the data server. What is the advantage to this? Well, now when the student wants to know his final grade, the following happens: 1. The student asks the client application. 2. The client application asks the server application. 3. The server application queries the data server. 4. The data server serves up a recordset with all the student's grades. 5. The server application does all the calculations to determine the grade. 6. The server application serves up the final grade to the client application. 7. The client application displays the final grade for the student. It's a much longer process on paper, but in reality it's much faster. Why? Notice step 6. Instead of serving up an entire recordset of grades, which has to be passed over a network, the server application is serving up a single number, which is a tiny amount of network traffic in comparison. There are other advantages to the 3-tier architecture, but that at least gives you a general idea of how it works. Incidentally, this website is a 3-tier application. The client application is your web browser. The server application is the ASP code which queries the database (the third tier) for the question-and-answer you requested. I hope that helps! ANKUR MISHRA
Which classes are used in java to create client server model?
we use sockets for client server model..
If a project is done in c plus plus then what is the frontend and backend?
The front-end is anything that interacts directly with the user (such as the GUI). The back-end is everything that goes on behind the scenes and is generally of no interest to the user. In a client-server application, the client is the front-end and the server is the back-end.
Does a server program request and receive services from a client program?
No. A server program receives and processes requests from a client program.
What is client server approach of c plus plus?
Client/server programs typically employ multi-threading where the primary thread handles the server side of things while one or more threads handle the client side.
