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IT Officer Professional Knowledge Notes: The OSI Model

IT Officer Professional Knowledge Notes: The OSI Model | Latest Hindi Banking jobs_3.1

Learning the Layers :

IT Officer Professional Knowledge Notes: The OSI Model | Latest Hindi Banking jobs_4.1

Layer 7 : The Application Layer



It enables a user whether a human or software to access the network. It provides user interface and support for services such as e-mail, remote file access and transfer share database management, and other types of distributed information services. 

The application layer is responsible for providing services to the user.
Provides a set of interfaces for applications to use to gain access to networked services.
Specific services of application layer include the following :

Network virtual terminal : A network virtual terminal is a software version of a physical terminal, and it allows a user to log on to a remote host. To do so, the application creates a software emulation of a terminal at the remote host. The user’s computer talks to the software terminal which, in turn, talks to the host, and vice versa. The remote host believes it is communicating with one of its own terminals and allows the user to log on.



File transfer, access, and management : The application allows the user to access files in a remote host (to make changes or read data), to retrieve files from a remote computer for use in the local computer, and to manage or control files in a remote computer locally.


Mail services : The application provides the basis for e-mail forwarding and storage.


Directory services : This application provides distributed database source and access for global information about various objects and services.

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