Q2. A DoS attack that sends a flood of synchronization (SYN) requests and never sends the final acknowledgement (ACK) is typically known as which of the following?
B. Ping Flood
D. SYN flood
Correct Answer: D
Some important types of Denial of Service attacks are as given below:
Smurf: This attack is based on ICMP requests. Here the attacker sends ping requests to broadcast addresses of networks. However, the source address of the ping request is replaced with a victim's device. As a result, the victim's device gets flooded with unwanted traffic.
Ping flood: Here the attacker directly sends the ping requests to the victim's computer in such a way that the target computer gets flooded with unwanted traffic.
Fraggle: Similar to Smurf. However, uses UDP packets that are directed at port 7 (Echo) or port 19 (chargen).
SYN flood: Here the attacker sends a flood of synchronization requests and never sends the final acknowledgment. This results in numerous TCP open sessions and eventually denying a TCP session to genuine users.
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