Spring Boot 2.0 was made generally available in early 2018 and was well received by many developers. The default web container is Netty, which indicates that the "reactive" container is already the trend of the times. Whether it is the co-dependent thread of Go language or the reactor thread model based on Java, they are both examples of realizing high concurrency based on event programming. Initially, I wanted to introduce NIO in detail, but I realized that before introducing NIO, it is necessary to understand the TCP protocol. Most applications currently operate on the application layer, so a lot of network details are hidden. Knowing these details and principles is helpful for troubleshooting.
This article introduces TCP in detail, including its underlying principle and application architectures, and discusses how to use it to build high-performance servers.
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