In this architecture, a specific computer is known as a server, specially designated to provide various services to other computers known as clients. In simple terms, the server can be defined as a provider of services, and the client can be a requester to services. The client requests any information from the server, and the server, in turn, responds to the client request, as shown in the below figure −
The most common client-server arrangement method is a LAN made out of microcomputers linked to a network server, which serves all LAN clients.
Following is the classification of Client/Server Architecture −
In the two-tier architecture, there exists only two parties; one is the client, and the other is the server. The main benefit of the client/server model is its simplicity. But there is a major problem when 100s of clients request the data from the server simultaneously. Every client will have to wait for its turn to come.
It is also referred to as multi-tier architecture. In this architecture, there is a middle layer within the client and the server. It clarifies the difficulty of waiting time by clients. It maintains a queue of requests by different clients, and the client can do their work; meanwhile, the server is busy processing other client’s request. The middle layer forwards the request, and the server, in turn, replies to the client.