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Network Architecture Elements

by Kasha Huon De Kermadec (2018-12-16)

<img src="" alt="architecture boards" title="architecture boards (c)" style="max-width:420px;float:left;padding:10px 10px 10px 0px;border:0px;">The key idea in fault tolerance is to make duplication for the above components such that if as fault occurred in each of them, there will be an alternate one and the network will still be functional. Scalability: the meaning of scalability is to ensure that the network can grow in the future without changing the design. Thus the administrator of the network can add more users to the network or add even an entire sub network without rebuilding the original network. This is a popular component in the internet architecture design.

SAP architecture is divided into three layers or servers. There is the presentation layer, the application layer and the database layer. They all run on different servers unlike the two layer architecture, where the presentation layer and the application one were on the same server and the database layer was managed separately. We can even talk about one level SAP architecture, where everything is stored on a single server. SAP is ERP software used for automating and integrating different business processes like production planning, inventory management, distribution, customer service, human resources management, finances or logistics. However, the three layers architecture is commonly used in production and in complex systems. Each of them is responsible for a certain processes and contributes to the good functioning of the entire system.

Software as a <a href="">Service</a> (SaaS) is a software licensing and delivery model in which the software is licensed on a subscription basis and applications are hosted and managed in a service provider´s data centre which is accessed via a browser over an internet connection.

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The application layer is where the applications are executed. The presentation layer is the one that allows the end user to interact with the application itself. Nowadays SAP R/3 comes in three-layer architecture. It is not compulsory to only use three servers, one for each layer, because the functions of each layer can also be managed on more than one server. This three tier architecture increases functionality because the load is being distributed on more servers. It is naturally understood that all the servers used have to be network connected. It communicates with the database layer which is responsible for processing and managing the data. It is called graphical user interface (GUI) and it makes possible using the application. It is usually common for the application layer to be distributed on multiple servers because this way a possible overload from the end users will be prevented.