Summary of transport layer knowledge points

1. Reference articles

0. Data units of each layer

Bit stream (bit): physical layer/layer.
Data frame (frame): data link layer/layer 2.
Data packet/message grouping (packet): network layer/layer three.
Datagram: Transport layer UDP/layer four.
Data segment (segment): Transport layer TCP/layer four.
Message/message: Layer 3 or above, usually refers to the application layer/layer 7.

1. Introduction to knowledge

[Computer network] Transport layer: Overview of the transport layer (device level | transport layer function | TCP protocol | UDP protocol | multiplexing and demultiplexing | port number | socket)_Han Shuliang's blog-CSDN blog_Transport layer equipment https : //blog.csdn.net/shulianghan/article/details/108375499?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164790867716780255212950%2522%252C%2522scm%2522%25 3A%252220140713.130102334.pc%255Fall.%2522% 257D&request_id=164790867716780255212950&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-6-108375499.142%5Ev2%5Epc_search_resul t_control_group,143%5Ev4%5Eregister&utm_term=%E4%BC%A0%E8%BE%93 %E5%B1%82&spm=1018.2226.3001.4187 2. Illustration

(128 messages) Computer Network (20) The Role of the Transport Layer_NEUChords’ Blog-CSDN Blog_The Role of the Transport Layer https://blog.csdn.net/NEUChords/article/details/91806399 Basic Knowledge of the Transport Layer_Zero Degree Soda Blog - CSDN blog https://blog.csdn.net/qq_41403559/article/details/105458496?ops_request_misc=&request_id=&biz_id=102&utm_term=%E4%BC%A0%E8%BE%93%E5%B1%82&utm_medium= distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-3-105458496.nonecase&spm=1018.2226.3001.4187 (128 messages) Error control differences (data link layer, transport layer, network layer)_konjac cat Blog - CSDN Blog_Is there error control in the network layer?https://blog.csdn.net/weixin_41413511/article/details/118222824?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164790867716780255212950%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=164790867716780255212950&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-20-118222824.142%5Ev2%5Epc_search_result_control_group,143%5Ev4%5Eregister&utm_term=%E4%BC%A0%E8%BE%93%E5%B1%82&spm=1018.2226.3001.4187

2. Video reference

1. Hunan University of Science and Technology
https://www.bilibili.com/video/BV1c4411d7jb?p=57
2. Transport layer https://www.bilibili.com/video/BV1Lp4y1B7wN?from=search&seid=6089864192161420373&spm_id_from=333.337.0.0
3 , https://www.bilibili.com/video/BV1mb4y1Z79B?from=search&seid=6089864192161420373&spm_id_from=333.337.0.0
Comprehensive network transmission knowledge: https://www.bilibili.com/video/BV1ET4y1S7Lo?from=search&seid=131180750149703372 42&spm_id_from=333.337 .0.0