2TCP, SCANNERS, AND PROXIES
Let’s begin our practical application of Go with the Transmission Control Protocol (TCP), the predominant standard for connection-oriented, reliable communications and the foundation of modern networking. TCP is everywhere, and it has well-documented libraries, code samples, and generally easy-to-understand packet flows. You must understand TCP to fully evaluate, analyze, query, and manipulate network traffic.
As an attacker, you should understand how TCP works and be able to develop usable TCP constructs so that you can identify open/closed ports, recognize potentially errant results such as false-positives—for example, ...
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