Application Layer in OSI Model
The seventh and the topmost layer in the Open Systems Interconnection (OSI) Model, the application layer is also a part of the Transmission Control Protocol and Internet Protocol (TCP/IP). To know more about the Application Layer in the OSI Model, keep reading this article till the end.
The main focus of this layer is to provide the process to process communication, meaning; to deliver messages from the source host to the destination host. It is also the only layer that holds a communication line with the end-user.
Categorically, it is an abstract layer which ensures the working details of a subsystem is well hidden and allows the facilitation of the separation of concerns (separation of a computer program into different section so that each section can handle a different responsibility) and platform independence.
It is necessary to distinguish between the application layer and an actual application. While an application is a type of software under the wide umbrella term ‘Software,' an application layer is merely a component inside it designed to establish and hold together a communication channel over a network. Unlike the other layers, it works independently and doesn’t need to interoperate with any of them.
Some of the services provided by the application layer:
Alongside these services, the application layer ensures that the receiving device is identified and is within the reach to receive data while detecting the Ethernet or Wi-Fi as the interface for the necessary communication.
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The main focus of this layer is to provide the process to process communication, meaning; to deliver messages from the source host to the destination host. It is also the only layer that holds a communication line with the end-user.
Categorically, it is an abstract layer which ensures the working details of a subsystem is well hidden and allows the facilitation of the separation of concerns (separation of a computer program into different section so that each section can handle a different responsibility) and platform independence.
It is necessary to distinguish between the application layer and an actual application. While an application is a type of software under the wide umbrella term ‘Software,' an application layer is merely a component inside it designed to establish and hold together a communication channel over a network. Unlike the other layers, it works independently and doesn’t need to interoperate with any of them.
Some of the services provided by the application layer:
- Simple Mail Transfer Protocol
- File Transfer, access and management
- Web surfing
- Mail service
- Directory services
- Exchange of messages
- Webchat
- Virtual terminals
- Addressing
- Network Virtual Terminal
Alongside these services, the application layer ensures that the receiving device is identified and is within the reach to receive data while detecting the Ethernet or Wi-Fi as the interface for the necessary communication.
Read more
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