Many advanced client-server technologies are already available which were designed to ensure security, user friendly interfaces, and ease of use.Under a P2P architecture, data updates may need to be distributed and applied to each "peer" in the network, which is both time-consuming and error-prone, as there can be thousands or even millions of peers. Since data storage is centralized, updates to that data are much easier to administrators than what would be possible under a P2P architecture.Servers can better control access and resources, to guarantee that only those clients with the appropriate permissions may access and change data. All the data is stored on the servers, which generally have better security controls than most clients.This independence from change is also referred to as encapsulation.
For example, it is possible to replace, repair, upgrade, or even relocate a server while its clients remain both unaware and unaffected by that change.
In most cases, a client-server architecture enables the worsening of roles and responsibilities of a computing system to be distributed among several independent computers that are known to each other only through a network, so one of advantages of this model is greater ease of maintenance.End users typically do not interact directly with a server, but use a client.If additional information is required to process a request (or security is implemented), a server may request additional data (passwords) from a client before processing a request.A server may communicate with other servers in order to serve a client request.Serves clients' requests then replies to the clients with the requested data.Always wait for a request from one of the clients.Usually interacts directly with end-users using any user interface such as graphical user interface.Usually connects to a small number of servers at one time.For example, a web browser is a client program at the user computer that may access information at any web server in the world.Ĭlients characteristics Standard networked functions such as E-mail exchange, web access and database access, are based on the client-server model. Many types of applications have been written using the client-server model.
#Free simple server software software
The client-server software architecture has become one of the basic models of network computing. The two-tier architecture means that the client acts as one tier and server process acts as the other tier. This type of architecture is sometimes referred to as two-tier. The basic type of client-server software architecture employs only two types of hosts: clients and servers. Sequence diagrams are standardized in the Unified Modeling Language. The interaction between client and server is often described using sequence diagrams. The client-server relationship describes the relation between the client and how it makes a service request to the server, and how the server can accept these requests, process them, and return the requested information to the client. Peer-to-peer architectures are often abbreviated using the acronym P2P.īoth client-server and P2P architectures are in wide usage today.Ĭlient-server relationship Another type of related software architecture is known as peer-to-peer, because each host or application instance can simultaneously act as both a client and a server (unlike centralized servers of the client-server model) and because each has equivalent responsibilities and status.
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