B/S is called the Browser/Server or Browser/Server
mode. Three layer architecture of B/S consists of database,
Web service layer and the browser of three parts. In B/S
structure is mainly by the browser by sending a request to a
Web service layer and Web service layer after the
transaction will request sent to the backend database,
background database on the requested data in the data
processing, then the processed data of concrete on the Web
server to resend it to the browser display [3]. B/S three-tier
architecture system is shown in figure