The difference between B/S and C/s

I. What are CS and BS structures?

1.C/S is also known as Client/server or client/server mode. Servers typically employ high-performance PCs, workstations, or minicomputer, and employ large database systems such as Oracle, Sybase, Informix, or SQL Server. The client needs to install the dedicated client software.

2.B/S is the abbreviation for Brower/server, as long as a browser (Browser) is installed on the client, such as Netscape Navigator or Internet Explorer, the server installs Oracle, Sybase, Databases such as Informix or SQL Server. The browser interacts with the database through the Web Server.

Client/server is built on the basis of local area network.

Browser/server is built on the basis of the WAN.

3. Different hardware environments:

c/S is generally established in a dedicated network, a small range of network environment, LAN and then through a dedicated server to provide connectivity and data exchange services.

b/S is built on the WAN, need not be specialized network hardware environment, example with telephone Internet, renting equipment. Information is managed by itself. Have more than C/s to adapt to the range, generally as long as there are operating systems and browsers on the line

4. Different for security requirements

c/S is generally oriented to a relatively fixed user group, the ability to control information security is very strong. Generally highly classified information systems use C/s structure suitable. Can be published through the B/s part of the public information.

b/S is built on the wide area network, the security control ability is relatively weak, facing is an unknown user group.

5. Different from the program architecture

c/S program can pay more attention to the process, the authority can be multi-level check, the system running speed can be less considered.

b/S multiple considerations for security and access speed are based on the need for more optimization. More than C/s has higher requirements B/s structure of the program architecture is the trend of development, from the MS. NET series of BizTalk Exchange 2000, etc., fully support the network component Building system. SUN and IBM push the JavaBean component technology, so that b/s more mature.

6. Software reuse is different

c/S program can inevitably be considered as a whole, the reuse of components is not as good as the reuse of components under B/s requirements.

The multi-structure of B/s pair requires the relative independent function of the component. Can be reused relatively well. You can reuse the table you bought, not the stone table on the wall.

7. system maintenance is different

System maintenance is the software life cycle, the cost is big,-------important

Due to the integrity of the C/s program, it is necessary to investigate the problem and upgrade the system. Upgrade is difficult. Could be a whole new system.

b/S components, components of individual replacement, to achieve seamless upgrade of the system. Minimal system maintenance overhead. Users can download and install themselves from the Internet to achieve upgrades.

8. Handling problems differently

c/S program can handle the user face fixed, and in the same area, security requirements of high demand, operating system-related. Should all be the same system.                                                                                                                                                                                                                   B/S is built on the wide area network, facing different user groups, dispersed area, this is the C/s can not be done. Minimal relationship to operating system platform

9. User interface is different

C/S is established window platform, the performance method is limited, the programmer generally requires higher

b/S is built on the browser, there is more rich and vivid expression way to communicate with users. And most of the difficulty is reduced, reducing development costs.

10. Different information flow

c/S program is typically a centralized mechanical processing, the interaction is relatively low

b/S information flow can change, b-b b-c b-g and other information, flow changes, more like the trading center

Ii. advantages and disadvantages of CS and BS structures

The advantage of 1.c/s is that it can give full play to the processing power of the client PC, and many work can be submitted to the server after the client processing. The corresponding advantage is that the client responds quickly. The disadvantages are mainly the following:

Ø only applicable to LAN. With the rapid development of the Internet, mobile office and distributed office is becoming more and more popular, which requires the expansion of our system. Remote access in this way requires specialized technology, and the system is designed specifically to handle distributed data.

Ø the client needs to install the dedicated client software. First of all, the workload of the installation, and then any computer problems, such as viruses, hardware damage, need to install or maintenance. In particular, there are many branches or stores of the situation, not the problem of workload, but the problem of distance. Also, when the system software is upgraded, each client needs to be reinstalled and its maintenance and upgrade costs are very high.

Ø There is a general limitation on the operating system of the client. may be suitable for Win98, but not for Win2000 or windowsxp. Or not for Microsoft's new operating system, let alone Linux, Unix, and so on.

The biggest advantage of 2.b/s is that it can be operated anywhere without any special software installed. As long as there is a computer can use the Internet, the client 0 maintenance. System extension is very easy, as long as the Internet, and then by the system administrator assigned a user name and password, it can be used. Can even apply online, through the company's internal security certification (such as CA certificate), no need for people to participate, the system can be automatically assigned to the user an account entry system.

B/S and C/s differences