Two popular architectures for web application system development

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C/S

Client/Server( The client / The server )
The server only manages data centrally , Computing tasks are scattered on the client , The client and server communicate through network protocol , The client sends a data request to the server , The server sends the data to the client for calculation , Calculation completed , The calculation result can be returned to the server .
Another situation is , The client performs simple preprocessing first , Then submit the processed results to the server for further processing . This mode is also commonly referred to as the fat client mode .

give an example ：QQ、Foxmail

B/S

Browser/Server( browser / The server )
The client uses a common browser instead of various application software , The server is Web The server .
Between the browser and the server through TCP/IP Communication protocol , Request from browser , from Web The server fetches data from the background for calculation , And return the result to the browser .
This model , We usually call it thin client mode .
give an example ： TaoBao 、 Dangdang

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