【正文】 Moreover platform architecture the file that also goes to today from past single user development/server ( F/S ) system and client puter/server ( C/S ) system and browser/server (B/S) system. The parison of C/S and B/S C/S and B/S is the now world two technologies of main stream of developing pattern technical configuration. C/S is that American Borland pany researches and develop most early, B/S is that American Microsoft researches and develop. Now this two technologies with quilt world countries grasp , it is many that domestic pany produce article with C/S and the technical development of B/S. This two technologies have the certain market share of self , is with customer crowd , each domestic enterprise says that own management software configuration technical function is powerful, advanced, convenient , the customer group that can lift , have a crowd scholar ink guest to shake flag self cry out , advertisement flies all over the sky , may be called benevolent to see kernel, sage sees wisdom C/S configures inferior position and the advantage of software (1) Application server operation data load is light paratively. The database application of the most simple architecture of C/S is bee by two partial groups, customer applies program and database server program. Both can be called as proscenium program and the program of backstage supporter respectively. The machine of operation database server program is also called as application server. Once server program had been started , waits the request concerning responding customer program hair at any time。s application is often for special purpose. It is lower to develop and defend cost: It need to be implemented on all client puters that the application of Client/Server must develop the customer end software for special purpose, no matter installation and disposition escalate still, have wasted manpower and material resources maximumly. The application of Browser/Server need in customer end have general browser , defend and escalate to work in server end go on , need not carry out any change as customer holds , have reduced the cost of development and maintenance so greatly. It is simple to use , interface friendly: The interface of the user of Client/Server is decided by customer end software, interface and the method of its use are not identical each, per popularize a system of Client/Server ask user study from the beginning, is hard to use. The interface of the user of Browser/Server is unified on browser, browser is easy to use , interface friendly, must not study use again other software, the use of a Lao Yong Yi that has solved user problem. Customer end detumescence: The customer end of Client/Server has the function that shows and handles data , as the requirement of customer end is a client puter it is fat very high. The customer of Browser/Server holds the access that not takes the responsibility for database again and the etc. task of plex data calculation, need it only show , the powerful role that has played server fully is so large to have reduced the requirement for customer end, customer end bee very thin . System is flexible: The 3 minutes of the system of Client/Server, in modular, have the part that need to change to want relation to the change of other modular, make system very difficult upgrading. The 3 minutes of the system of Browser/Server modular relative independence, in which a part of modular change, other modular does not get influence, it is very easy that system improve to bee, and can form the system with much better performance with the product of different manufacturer. Ensure systematic safety: In the system of Client/Server, directly join with database server because of client puter, user can very easily change the data on server, can not guarantee systematic safety. The system of Browser/Server has increased a level of Web server between client puter and database server , makes two not to be directly linked again, client puter can not be directly controled for database, prevent user efficiently invade illegally. The architecture of Browser/Server of threelayer has the advantage that a lot of traditional architectures of Client/Server does not have , and is close to have bined the technology of Inter/Intra, is that the tendency of technical development tends to , it application system tape into one brandnew develop times. From this us option the configuration of B/S the architecture that develops as system. what are C/S with B/S For C/S with the technology of B/S develop change know , first,must make it clear that 3 problems. (1) What is the structure of C/S. C/S ( Client/Server ) structure, the server structure and client puter that all know well. It is software systematic architecture, through it can hold hardware environment fully using two advantage, realize task reasonable distribution to Client end and Server end , have reduced systematic munication expense. Now, the most systems of application software are the two levels of structure of the form of Client/Server , are developing to the Web application of distribution type since current software application is systematic, Web and the application of Client/Server can carry out same business handling , apply different modular to share logic assembly。 It is even in one time dialogue course, mutual role also exchanges probably. As in carry out file transmission , if be called as one side who offers file server, is called as one side who gets file customer, when using get or mget order since another node takes file, can think that what self use and it is client puter , is using put or mput order to another node dispatch file can again think the machine that used self is server. Multilayer customer / server structure Along with the development of enterprise application, re