Transmission Control Protocol

(redirected from SYN Packet)
Also found in: Dictionary, Thesaurus.

Transmission Control Protocol

[tranz‚mish·ən kən′trōl ‚prōd·ə‚kȯl]
(communications)
The set of standards that is responsible for breaking down and reassembling the data packets transmitted on the Internet, for ensuring complete delivery of the packets, and for controlling data flow. Abbreviated TCP.

Transmission Control Protocol

(networking, protocol)
(TCP) The most common transport layer protocol used on Ethernet and the Internet. It was developed by DARPA.

TCP is the connection-oriented protocol built on top of Internet Protocol (IP) and is nearly always seen in the combination TCP/IP (TCP over IP). It adds reliable communication and flow-control and provides full-duplex, process-to-process connections.

TCP is defined in STD 7 and RFC 793.

User Datagram Protocol is the other, connectionless, protocol that runs on top of IP.
References in periodicals archive ?
The traffic rate of the source node including the SYN packet rate and the http request rate may not be effective any longer in discriminating the normal flows from the DoS attack flows, since the DoS attack can be effective, even with a low traffic rate after the emergence of low-rate attack tools, such as slowloris.
1) SYN Attack: A SYN flood attack occurs when a network becomes so overwhelmed by SYN packets initiating incomplete able connection request that it can no longer process legitimate connection requests, resulting in a denial of service (DoS).
The host controlled sends TCP/IP SYN packets, and target hosts will receive a lot of information packets with wrong IP addresses.
In a SYN flood, attackers send numerous SYN packets to exhaust memory resources of victim by enforcing it maintaining a large number of semiconnected states, so the victim will not respond to affirmed connection request.
* SYN Flooding: The weakness of the TCP handshake is used by attacker and also sends an abundance of TCP SYN packets to the victim.