Introduction to TCP/IP Learning---Layering overview (1)

This article is intended to describe some of the learning notes

OSI layering: application layer, presentation layer, session layer, Transport layer, network layer, data link layer, physical layer

Detail point:

1. Application layer: provide services for the application and specify the details of communication in the program.

2. Presentation layer: Converts the information processed by the application into a format suitable for network transmission, or converts the data from the next layer into a format that can be processed at the upper level. It is therefore primarily responsible for the conversion of data formats. Specifically, the device's inherent format is converted to a network standard format.

3. Session Layer: responsible for establishing and disconnecting the communication connection (the logical path of data flow), as well as data segmentation and other transmission to the light management.

4, Transmission layer: The role of reliable transmission. Processing is done only on both nodes of the communication, without having to process on the router.

5, the network layer: transfer data to the destination address. This layer is primarily responsible for addressing and routing.

6, Data Link layer: responsible for the physical level of interconnection, communication between the nodes transmission. Divide the sequence of 0 and 1 into meaningful data frames for transmission to each other.

7. Physical Layer: responsible for the conversion between 0, 1 bit stream and voltage, and the flash of light.

Introduction to TCP/IP Learning---Layering overview (1)