What is SYN Flood, ICMP Flood SYN Flood : A SYN flood occurs when a host sends a flood of TCP/SYN…

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What is SYN Flood, ICMP Flood

SYN Flood : ASYN floodoccurs when a host sends a flood of TCP/SYN packets, often with a

fake/forged sender address. Each of these packets is handled like a connection request, causing the

server tospawn a half-open connection, by sending back aTCP/SYN-ACK packet(Acknowledge), and

waiting for a packet in response from the sender address(response to the ACK Packet). However,

because the sender address is forged, the response never comes. These half-open connections

saturate the number of available connections the server is able to make, keeping it from responding to

legitimate requests until after the attack ends

ICMP Flood : There are three types of ICMP Flood :

1) Smurf Attack : http://en.wikipedia.org/wiki/Smurf_attack

2) Ping Flood : http://en.wikipedia.org/wiki/Ping_flood

3) Ping of Death : http://en.wikipedia.org/wiki/Ping_of_death