The Presentation layer is the 6th layer of the OSI reference model. The presentation layer performs certain functions requested to guarantee the discovery of a general solution to a particular problem. The presentation layer does not allow the user to solve the problem itself. Unlike the layers below which only move bits from one place to another, the presentation layer takes into account the syntax and semantics of the information transmitted. TROUBLESHOOTING LAYER PESENTATION (PRESENTATION LAYER)
A. Troubleshooting Methods The OSI model also provides a systematic basis for addressing network problems. In any troubleshooting scenario, the basic troubleshooting procedure includes the following steps:
1. Identify and prioritize alternative solutions.
2. Select an alternative as a solution.
3. Implement the solution.
4. Evaluate the solution.
The OSI model can be used as a guide for troubleshooting. Using layered models, there are three different troubleshooting approaches that technicians can use to isolate problems:
1. Bottom-Up The bottom-up approach begins with the physical components of the network and works by way of rising layers of the OSI model. Bottom-up problem solving is an effective and efficient approach to suspect physical problems.
A. Troubleshooting Methods The OSI model also provides a systematic basis for addressing network problems. In any troubleshooting scenario, the basic troubleshooting procedure includes the following steps:
1. Identify and prioritize alternative solutions.
2. Select an alternative as a solution.
3. Implement the solution.
4. Evaluate the solution.
The OSI model can be used as a guide for troubleshooting. Using layered models, there are three different troubleshooting approaches that technicians can use to isolate problems:
1. Bottom-Up The bottom-up approach begins with the physical components of the network and works by way of rising layers of the OSI model. Bottom-up problem solving is an effective and efficient approach to suspect physical problems.
2. Top-Down The top-down approach begins with the user application and works its way down the layers of the OSI model. This approach begins with the assumption that the problem is with the application and not the network infrastructure.
3. Divide-and-Conquer used by more experienced network technicians. The technician makes the guess targeting the problem layer and then based on the observed results, moving up or down the OSI layer.
B. Troubleshoot in presentation layer (presentation layer) The reason why the role of the presentation layer is not always used in network communication is that the work mentioned above is not always necessary. Compression and encryption are usually considered "optional", and translation features are also required only under certain circumstances. Another reason why the presentation layer is sometimes not mentioned is that its function can be performed as part of the application layer. For upper layers (5 to 7) of the OSI model deal with application issues and generally only implemented in software. Application layer closest to end user. Both the user and the application layer process interact with the software application containing the communication component. So the Technician should also check the application configuration. For example, if troubleshooting an email, make sure that the properly configured application sends and receives email server information. It is also necessary to ensure that domain name resolution works as expected.
