G01:Client Server Architecture

 

G01

Client Server Architecture

A central server (host computer) serves as both the source of service requests and the destination for many clients (remote processors) in a client-server architecture or model of a computer network.

Client computers offer an interface through which a computer user can ask the server for services and see the results that the server sends back.

Before responding to client requests, servers wait for them to arrive.

Client computer requests something from the server. Such as visiting a website.

Server computer serves the request. Such as responding to the webpage.

 

Types of Client-Server Architecture

1.       1-Tier Architecture

2.       2-Tier Architecture

3.       3-Tier Architecture

1-Tier Architecture

All application-related components are gathered together and used as a single package to deliver the application in a one-tier client-server architecture. One entity is made up of all the logic associated with the User Interface, Business Logic, Database Logic, and Database.

Although a 1-tier architecture is a dependable source due to its many services, managing it can be challenging.

The main issue is the variance in the data.

Work is frequently repeated.

The presentation layer, business layer, and data layer are among the layers that make up a 1-tier architecture. These layers are integrated together via a special software program. Typically, data stored in this layer is kept on shared drives or local systems.

 

2 Tier Architecture

Two layers comprise the entire application logic in a two-tier client-server architecture.

In this architecture, the database functions primarily as a separate entity.

Databases are designed independently, and the main application contains all of the business, database, and user interface logic needed to interact with the database and process applications. Compared to the 1-tier architecture, this architecture has a better environment.

Since there is no middleman between the client and the server, 2-tier architectures are faster than 1-tier architectures. Confusion among clients is reduced thanks to the two-tier architecture. A well-known illustration of a two-tier architecture is the online reservation system.

 

3 Tier Architecture

A 3-tier system's architecture includes a middleware between the client and the server, in contrast to a 2-tier system's architecture that lacks one.

The middleware receives requests for information from the server on behalf of clients. After that, the request will be forwarded to the server for handling. In the same way, the client will receive a response from the server.

The presentation layer, application layer, and database layer are the three primary layers of a three-tier architecture. Every layer has distinct ends that regulate one another.

The presentation layer is managed by client devices, while the application and database layers are managed by middleware and servers, respectively. The three-tier architecture is more secure because of the third layer's data control functionality, invisible database structures.

 

Cloud Computing

 

Cloud computing is the data storage platforms like Google Drive, Dropbox, OneDrive or Box.

It is the delivery of computing services.

Cloud computing is the Internet-based delivery of various services.

Data storage, servers, databases, networking, and software are a few examples of the tools and applications that fall under this category.

With cloud-based storage, files can be saved to a remote database instead of being stored on a local or proprietary hard drive. An electronic device can access data and the software needed to run it as long as it can connect to the internet.

Many factors make cloud computing a popular choice for individuals and companies, including lower costs, higher productivity, speed and efficiency, performance, and security.

 

Cloud Computing Service model

Unlike a microchip or a cellphone, cloud computing is not a single technological device. Rather, it is a system that is mainly made up of three services: infrastructure-as-a-service (IaaS), software-as-a-service (SaaS), and

PaaS, or platform-as-a-service.

IaaS, often known as serverless computing, offers end users IT infrastructure over the internet.

End users, who are primarily software developers, are served by PaaS for both software and hardware. The user can create, launch, and manage their own apps with PaaS without having to worry about building and maintaining the infrastructure.

SaaS is a type of software licensing that eliminates the need for local download and installation by enabling software access via external servers on a subscription basis.