application layer in osi model

the receiving side must send back the acknowledgement, and if the packet is lost, it must be resent.Network layer:Responsible for communication between neighboring computers. Its functions include three aspects.First, processing packets from the transport layer to send the request, after receiving the request, will be grouped into the IP datagram, populate the header, select the path to the host, and then send the datagram to the appropriate network

Differences between an ISO 7-layer model and an ISO 5-Layer Model TCP/IPThe layered model (TCP/IP layering model) is also known as the Internet layered model or the Internet Reference

the target device and the data will be re-sent if no acknowledgement has been received within the specified time.Monitor Service quality.Session LayerThe session layer, the 5th layer of the OSI model, is the interface between the user application and the network, and the ma

during the transmission of the data. The data is encrypted at the sender end and decrypted at the receiving end. Encrypt and decrypt data using the encryption key. The presentation layer is also responsible for compressing the files, compressing the file size by algorithms, and reducing transmission costs. Application Layer

Explanation of the Communication Model of the physical layer, and explanation of the Physical Layer Model Introduction As the underlying layer of wireless communication protocols, the physical layer plays a crucial role in commun

Always feel that the model layer is only used to manipulate data, a lot of business processing in the controller, there is a claim that business logic is more suitable for the model layer, do not know which processing better! Look at the tp5.0, as if the business logic in the model