What is an application layer?

Computer network is usually designed based on a network diagram. This topology is defined on the basis of the connection of open systems (OSI) connection and consists of seven layers of a network function. The application layer is the highest level in OSI, known as a layer of seven. It is a network layer that manages communication programs in the network, including file transfer protocol (FTP), Hypertext Transfer Protocol (HTTP) and E -mail. These programs allow internet browsers and e -mail data to share data across the network.

The network starts with a physical cable and ends with a computer application. The data is forced to several levels of transformations during the usually communication transmission. This is a necessary process to ensure the right data quality and security rules. The OSI model was created to allow flexibility in software protocols.

The OSI model consists of seven layers. These are physical, data interconnection, network, transport, session, presentations and application layers. Layers work in HIerarchic structure for sending messages across the network. This network protocol uses the OSI model as a plan of how network devices and software should interact. Each layer in the model has a specific responsibility within the network topology.

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OSI model is designed on the basis of hierarchical chaining of responsibility. These rules force each layer to monitor specific transmission processes when sending a message via topology. The application layer is obliged to observe the rules of the presentation layer, which is another level in the hierarchy chain. These rules usually include format, encryption and requirements for a specific size before the message can accept the tdal level in the string.

Fast messages (IM) is a Communication Protocol of Poplar, which is used on mobile phones and computer systems. Im is an example of software that uses application layer protocol. Standard protocoL im allows companies to create software for quick message sending. Examples of these products include AOL® Instant Messenger, Yahoo® Mail and MSN® Messenger. Each program uses OSI standards to send and receive messages across the network in this layer.

Microsoft Outlook® is an example of an e -mail application that uses the application layer. This is the lowest level of OSI, which is responsible for packing messages from the software program to a comprehensible computer message. The application layer sends a message to the presentation layer, which is responsible for the rules of encryption and format of the message.