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Inside the TCP Handshake

Inside the TCP Handshake

Explore the TCP handshake in preparation for building a SYN scanner.

Introduction to port scanning

The concept of port scanning itself is based on the operation of the Transmission Control Protocol (TCP) and its counterpart, the User Datagram Protocol (UDP). While an IP address uniquely identifies a computer, these protocols define ports that allow communication with specific applications on a computer. ...