本系列文章是组内写给新人和实习生的 TCP入门系列教程，结合了理论和实践，本篇为第二篇，建议先读上篇《通过实验深入了解TCP 连接的建立和关闭》。 TCP 数据的发送与接收是个很大的话题，拖了很久也想不到好的切入点。这部分可以简单分为 「超时重传」 ...

上周有位读者面美团时，被问到：TCP 四次挥手中，能不能把第二次的 ACK 报文， 放到第三次 FIN 报文一起发送？ 虽然我们在学习 TCP 挥手时，学到的是需要四次来完成 TCP 挥手，但是在一些情况下， TCP 四次挥手是可以变成 TCP 三次挥手的。 而且在用 wireshark 工具 ...

TCP的经典异常问题无非就是丢包和连接中断，在这里我打算与各位聊一聊TCP的RST到底是什么？现网中的RST问题有哪些模样？我们如何去应对、解决？本文将从RST原理、排查手段、现网痛难点案例三个板块自上而下带给读者一套完整的分析。 一、背景 最近一年的 ...

做IT相关的工作，肯定都离不开网络，网络中最重要的协议是TCP。无论是实际工作还是笔试面试，你看哪里能少得了TCP?我看过RFC中与TCP相关的文档，也看过linux中TCP相关的源码，也看过不少框架中的TCP相关的代码，对TCP是有点感觉了。 其实，搞透了TCP之后，发现 ...

The procedure that takes place between two TCP/IP nodes to establish a connection. Known as the "SYN, SYN-ACK, ACK handshake," computer A transmits a SYNchronize packet to computer B, which sends back ...

Transmission Control is an essential aspect of network activity and governs the behavior of many services we take for granted. When sending your emails or just browsing the web you are relying on TCP ...

NETSTAT base parameters can help you troubleshoot TCP/IP problems Your email has been sent Tracing TCP/IP connectivity problems on a system can be very time-consuming, considering the many connections ...

Radware has found itself in 2019 defending against what it calls a "steady" rise in TCP DDoS reflection attacks. Since low-bandwidth TCP reflection attacks were thought in the past not to be able to ...

The specific type of TCP attack used in the recent spate of DDoS efforts were TCP SYN-ACK reflection attacks. The last 30 days has seen a renewed increase in distributed denial-of-service (DDoS) ...