1. Simple understanding of the presentation layer
OSI layer six: presentation layer function_dream_uping's blog-CSDN blog_presentation layer original text link: http://www.hcie.me/200OSI seven-layer model layer six: presentation layer, Presentation LayerOSI presentation layer function: computer When a string of data is received from the network card, the data is in binary format in the computer. We humans cannot understand binary, so we need the presentation layer to help convert these binary into data that we can recognize. Therefore, the basic function of the presentation layer is to compile the data format, and process the received or sent data according to the characteristics of the application layer, such as processing it into text, pictures, audio... 
https://blog.csdn.net/weixin_42859280 /article/details/86512512?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164808359116782092926273%2522%252C%2522scm%2522%253A%252220140713 .130102334..%2522%257D&request_id=164808359116782092926273&biz_id=0&utm_medium=distribute.pc_search_result.none- TASK-BLOG-2 ~ All ~ Sobaidund ~ DEFAULT-86512512.142%5EV3%5EPC_SEARCH_RESULT_CONTROL_GROUP, 143%5EV4%5register & UTM_TERM =%E8%A1%A8%E7%E7%E7%E7%E7%E7% %A4%BA%E5%B1%82 & SPM = 1018.2226.3001.4187 2 , Presentation layer of foreign language translation
osi seven-layer model, presentation layer_Presentation layer-OSI model_cunfen6312's blog-CSDN blog osi seven-layer model, presentation layer presentation layer-OSI model (Presentation Layer - OSI Model) The primary goal of this layer is to take care of the syntax and semantics of the information exchanged between two communicating systems. Prese... https://blog.csdn.net/cunfen6312/article/details/107685715?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164808359116782092926273% 2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=164808359116782092926273&biz_id=0&utm_medium=distribute.pc_search_result.none-t ask-blog-2~all~sobaiduend~default-2-107685715.142%5Ev3%5Epc_search_result_control_group,143% 5Ev4%5Eregister&utm_term=%E8%A1%A8%E7%A4%BA%E5%B1%82&spm=1018.2226.3001.4187 osi seven-layer model, presentation layer_The function of the presentation layer in the OSI model | Computer network_cumubi7453's blog- CSDN blogOSI seven-layer model, presentation layer What is the presentation layer? (What is Presentation Layer?)The Presentation Layer is concerned with the syntax and semantics of the information exchanged between two communicating devices. The presentation layer and the syntax of the information exchanged between two communicating devices... https: //blog.csdn .net/cumubi7453/article/details/107802703?ops_request_misc=&request_id=&biz_id=102&utm_term=%E8%A1%A8%E7%A4%BA%E5%B1%82&utm_medium=distribute.pc_search_result.none-task-blog-2~ all~sobaiduweb~default-3-107802703.nonecase&spm=1018.2226.3001.4187
3. The seven-layer model of vernacular
OSI 7-layer model explanation (easy to understand in vernacular)_ZhSuZhan's blog-CSDN blog_osi seven-layer model article directory>Application layer>Presentation layer>Session layer>Transport layer>Network layer>Data link layer>Physical layer>Summary > Application layer The application layer is the highest layer of the OSI reference model. It is the interface between computer users, various applications and the network. It is used by network applications, that is, computer applications that use the Internet, such as Google and Firefox. These applications do not reside in the application layer, but they use various network protocols of the application layer, such as HTTP protocol and HTTPS protocol. There are dozens of application layer protocols with various functions in this layer. These protocols form the basis of various network services, such as domain name resolution protocol DNS protocol, and file transfer is completed with the help of FTP protocol..https://blog.csdn.net/weixin_44129618/article/details/113881121?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164808747616780265417671%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=164808747616780265417671&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-1-113881121.142^v3^pc_search_result_control_group,143^v4^register&utm_term=OSI+7%E5%B1%82%E6%A8%A1%E5%9E%8B%E8%AE%B2%E8%A7%A3%EF%BC%88%E5%A4%A7%E7%99%BD%E8%AF%9D+%E9%80%9A%E4%BF%97%E6%98%93%E6%87%82%EF%BC%89_ZhSuZhan%E7%9A%84%E5%8D%9A%E5%AE%A2-CSDN%E5%8D%9A%E5%AE%A2_osi%E4%B8%83%E5%B1%82%E6%A8%A1%E5%9E%8B&spm=1018.2226.3001.4187
4. Some exercises Computer Network Tutorial Chapter 2 Multiple Choice Questions, Computer Network Chapter 2 "Reference Model + Network Standardization" Exercises..._Fitness Coach Ason's Blog-CSDN Blog 1 [Single Choice Question] The network layer data unit is called (). A, packetB, frameC, segmentD, bit Correct answer: A My answer: A Score: 5.5 points Answer analysis: It’s just a title, the common name is agreed upon, just remember it. 2 [Single-choice question] What implements end-to-end communication in the hybrid five-layer network reference model (). A. Application layer B. Transport layer C. Network layer D. Data link layer Correct answer: B My answer: B Score: 5.5 points 3 [Single-choice question] The () layer is responsible for the routing function in the network reference model . A. Application B. Transmission C. Network... https://blog.csdn.net/weixin_32260467/article/details/118349819?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2% 7Edefault%7EOPENSEARCH%7ERate-2.pc_relevant_default&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7ERate-2.pc_relevant_default&utm_relevant_index=5