SYNC flood Attack

The SYN flood attack is a common denial-of-service (DoS) attack. The three way
handshake to establish a session. As a reminder, one system sends a SYN packet, the second
system responds with a SYN/ACK packet, and the first system then completes the handshake with an
ACK packet. However, in a SYN flood attack, the attacker sends multiple SYN packets but never
completes the third part of the TCP handshake with the last ACK packet.