What is presentation layer? - Definition from WhatIs.com.
The presentation layer manages these abstract data structures and allows higher-level data structures(eg: banking records), to be defined and exchanged. Functions of Presentation Layer Translation: Before being transmitted, information in the form of characters and numbers should be changed to bit streams.
By providing translation services, the Presentation layer ensures that data transferred from the Application layer of one system can be read by the Application layer of another host. The OSI has protocol standards that define how standard data should be formatted.
The presentation layer delivers information to the application layer for display. The presentation layer, in some cases, handles data translation to allow use on a particular system. The user interface shows you the data once the presentation layer has done any translations it needs to.
Key Concept: The seventh and highest layer in the OSI Reference Model is the application layer.Application protocols are defined at this layer, which implement specific user applications and other high-level functions. Since they are at the top of the stack, application protocols are the only ones that do not provide services to a higher layer; they make use of services provided by the layers.
Business Layer is to define business logic (data transformation) and Service Layer is to access data from different client's. 2. Service Layer is to unplug BL (Business Layer) from UI or other layer 3.
Layer No. Layer Name. Description. 7. Application. Consists of standard communication services and applications that everyone can use. 6. Presentation. Ensures that information is delivered to the receiving machine in a form that the machine can understand. 5. Session. Manages the connections and terminations between cooperating.
If you have heard of HTTP 1.0 or HTTP 1.1, these application layer protocols somehow follow the session layer orders in delivering the data. Authentication.