What is the service layer?
The service layer is used in computer and telecommunications systems that help delegate tasks. The service layer must be under a higher layer because it is made only to help in effort; It is not made to perform tasks without instruction. When this layer receives a task, it contacts layers, programs or features responsible for completing the task and tell them to turn on or off. Except for communication, this layer usually has no own functions. Work can be difficult for the upper layer, so to get this layer to make a communication alleviates some computational voltages.
When a service layer is used, it cannot be used as an upper layer that receives instructions from users. This is because this layer would not understand how to interpret the instructions, nor do it know how to meet them. It must be under another layer for proper operation. One way to think of this layer is as an assistant that is good in performing tasks and organizing workers, but not in decision -making without being directlyTo put it, what to do.
After the upper layer receives the instruction, it delegates it to the service layer below it. For example, the upper layer can be said to start sending data packets to the location. This layer tells a layer of service that will contact all programs and functions responsible for performing this task and tell them to start working.
While a layer of services can say another function to work, the layer itself rarely has one of its own functions. It can organize other areas of the computer to properly fulfill the task, but cannot perform the task itself. This means that this layer only serves as a connection between the upper layer and functions.
The main reason for the use of the service layer is to facilitate the upper layer of the processing of requirements and the calculation voltage from the upper layer. Without a layer of service, uppevrstvi R would have to accept tasks from the user, find the correct features to perform task,Contact these features and continue to interpret user commands simultaneously. This is often difficult and can lead to slow processing between layers. By adding the middle layer, the top layer can focus on obtaining and moving tasks to make the user's needs easier.