Client server architectures have significantly reduced application development time by distributing information exchange duties to both the client and server.
The client request the service, whereas the server is the service provider. In the majority of client-server environments, the server processes the data and returns the results to the clients, which speeds up performance.
For example, a printer can be linked to a computer (which acts as the client) at a workstation, while other computers sharing the printer act as the server.
For instance, at a workstation, a printer can be connected to a computer (which represents the clients), while other computers sharing the printer function as the server.
Client-server architecture is a approach in which the server hosts, provides, and maintains the majority of the client-side resources and services. This design utilises one or more client computers that are connected to a central server through a network or the internet. Because all requests and services are supplied through a network, client-server architecture is sometimes referred to as a networking computer paradigm or client-server network.
How Client Server model work
A client-server system is a software architecture that consists of both a client and a server, with the client always making requests and the server continually replying. Client-server communication enables inter-process communication since it entails the exchange of data between the client and the server, each of which performs separate functions.
Advantages of Client Server Model
- It allows easier It splits the processing of application across multiple machines sharing of resources from client to servers.
- It splits the processing of application across multiple machines
- It reduces data replication by storing data on each server instead of client
Types of Client Server Architecture
Typically, a client-server architecture consists of three components: an application server, a database server, and a personal computer. The two primary architectures are two-tier and three-tier.
There are only two components to this architecture: the database server and a client computer. In a two-tier design, users will execute programmes on their personal computers (Clients), which will connect to the server over a network.
The client application is responsible for running both the code and business logic and displaying the results to the user. It is sometimes referred to as a thick client.
It is taken into consideration when the client computer has direct access to the database, with no the need for an mediator to do so. Aside from that, it is also utilised to conduct application logic, in which case the application code will be allocated to each client in the workstation.
This architecture is composed of three components: a client computer, a database server, and an application server. A three-tier architecture may be extended to an N-tier architecture by adding more application servers. Due to the client’s involvement in this architecture being limited to display logic, the client is needed to utilise less resources and write less code.
It enables a single server to manage a high number of clients while also utilising extra server resources.
This process makes use of an intermediary (Application server), often known as middleware.
The application server, which functions as a link between the client PC and the database server, is one of the three tiers of the three-tiered architecture. The middleware tier is a stand-alone piece of software that runs on a separate machine and is in charge of application logic.
N Tire Architecture
N-tier architecture is also known as multi-tier architecture since the software is designed to physically and logically divide the processing, data management, and display tasks. That is, these various functions are housed on many computers or clusters, guaranteeing that services are supplied without sharing resources and, as a result, these services are offered at maximum capacity. The “N” in n-tier architecture refers to any integer starting with 1.
Client Server Architecture Diagram
This diagram explain how typical client server model is working. Laptop, PC and Mobile all devices are request to server computer for their services. In response the server return request legitimate services to client computer.
Issues And Challenges In Client-Server System
There are lots of issues in a client-server system, some of which include:
Security: Most crucially, there is the problem of security. Servers may readily access the client operating system, which exposes the client system to a multitude of issues. The communication flow between the client and server raises a slew of security concerns. Security encompasses a wide range of issues.
It requires skilled expertise: Many client-server networks are poorly designed and managed. Because setting up a client server network is so complicated, it takes professional technicians and maintenance experts.
The servers are quite expensive: The servers are being developed to satisfy high standards in order to be more dependable and perform better. Obtaining a good design and architecture for the client-server system contributes to its high cost.
The number of people: In most client-server networks, only a few servers are involved, making the configuration appear to be a waste of effort.
Because a client-server network is complex to set up, it requires a large number of servers in order to avoid rendering the programme unusable..
Some other Challanges
- The Audit network
- The discretionary control
- The object re-use
- Authorization and identification .