tcp相关

三次握手

四次挥手

拥塞控制、拥塞避免

https://www.bilibili.com/video/BV1aPBCYCESR?buvid=XUAC7D6A478B90B78CD5A5957F57295FDA5BA&from_spmid=search.search-result.0.0&is_story_h5=false&mid=D%2F9Cy282Dt196TvR5%2BKmzA%3D%3D&plat_id=116&share_from=ugc&share_medium=android&share_plat=android&share_session_id=f1d8f630-c81c-4045-ad2e-3643aef36c03&share_source=WEIXIN&share_tag=s_i&spmid=united.player-video-detail.0.0&timestamp=1760350785&unique_k=k5d58Ma&up_id=431029668&vd_source=0404d052110f319caf00323d54512b50

tcp重传（超时重传，快速重传）

https://b23.tv/ibP4lkG?share_medium=android&share_source=weixin&bbid=XUAC7D6A478B90B78CD5A5957F57295FDA5BA&ts=1760351019828

tcp流量控制

https://www.bilibili.com/video/BV1sQXDYREwP?buvid=XUAC7D6A478B90B78CD5A5957F57295FDA5BA&from_spmid=search.search-result.0.0&is_story_h5=false&mid=D%2F9Cy282Dt196TvR5%2BKmzA%3D%3D&plat_id=114&share_from=ugc&share_medium=android&share_plat=android&share_session_id=7c843d97-09f9-4c66-bb0e-6a982319b117&share_source=WEIXIN&share_tag=s_i&spmid=united.player-video-detail.0.0&timestamp=1760351131&unique_k=0s1f7b6&up_id=327247876&vd_source=0404d052110f319caf00323d54512b50

tcp、udp区别

核心区别在于TCP面向连接、可靠但开销大，适用于高可靠性场景；UDP无连接、不可靠但高效，适用于实时性要求高的应用‌。