What is the role of the OSI application layer?

Answer 1

Application layer is the top layer of the OSI (Open System Inter connectivity) server layer model. This layer handles issues like network transparency, resource allocation and problem partitioning. The application layer is concerned with the user's view of network (e.g. formatting electronic mail messages). The presentation layer provides the application layer with a familiar local representation of data independent of the format used on the network. The application layer provides the interface to the communications environment which is used by the application process. It is responsible for communicating application process parameters.

Answer 2

Application layer is designed to convert user data to language that can be understood by Presentation layer. For instance, http is at Application layer and converts people language to language that can be understood by browsers.

Answer 3

The function of the application layer is to interface between an external program application and the network stack. As such it has to build the first part of the packet that describes the protocol being used in the network.

There are a series of API (application Program Interfaces) which allows a software developer to interface with the OSI layers without knowing anything about how to network.

Answer 4

Application Layer, this layer allows you to use an application that will communicate with say the operation system of a server. A good example would be using your web browser to interact with the operating system on a server such as Windows NT, which in turn gets the data you requested.

Answer 5

provides the interface between applications on either end of the network