3.1.9 Client–server model
Understanding network connectivity is an important part of understanding how data is moved across the network.
Since the inception of the internet, the primary method that businesses use to process data has been through a client-server model. Consider the way organisations might implement file servers. End users within an organisation can store any number of files and documents on the file server, allowing end devices to conserve memory and processing power for use on local applications. By storing files on a central file server, other users within the organisation can easily access these files, which allows for greater collaboration and sharing of information. Finally, with centralised services (such as file servers), organisations can also implement centralised security and backup procedures to protect those resources.
With the growth of the internet and the expansion of mobile users, the client-server model is not always the most effective option. As more individuals connect from greater distances, having a centralised server may not be optimal. Those that are farther away from the server may experience greater delays and more difficulties accessing the information. These changes in requirements for organisations and individuals have led to cloud computing.
Figure 7 depicts the relationship between email client, web client and file client and their respective servers. Press the plus buttons to reveal the different relationships.