SYN flooding

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A form of denial of service attack which attempts to set up a large number of random connections to a computer on a network which is running the Internet Protocol. Each connection requires the computer to devote resources to the connection, but after a time resources become so scarce that the performance of the computer that is being connected degrades and it denies any legitimate requests from real users. There were a small number of famous SYN flooding attacks in the 1990s, but TCP-IP software has now been amended to make them much more difficult to carry out.

Subjects: Computing.

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