The application layer of computer network ramble

About the network we have discussed today, the entire network framework we have built up. We say the data link layer, the network layer, the transport layer, in fact, the application layer is on the basis of our discussion before the use of these layers, I intend to illustrate the HTTP protocol, is also the application layer is very important protocol, the role of "application Layer" is to specify the application data format. For example, the HTTP protocol packets are basically as follows:

The responsibility of the HTTP protocol is to organize the data into this form, and then fill in the "Data" section of the TCP packet. Therefore, the current Ethernet packet becomes the following, data is actually the above HTTP format string.

is not quite good to understand, layers down the data, and then send. The other side receives the data to be split up, then gets the HTTP packet, then reads the data. Total Chain: A series of articles on computer network