A form of cyber attack in which an authorized user gains access to a legitimate connection of another client in the network. Having hijacked the TCP/IP session, the attacker can read and modify transmitted data packets, as well as send their own requests to the addressee.
TCP/IP hijacking is a type of man-in-the-middle attack. The intruder can determine the IP addresses of the two session participants, make one of them inaccessible using a DoS attack, and connect to the other by spoofing the network ID of the former.