What is a characteristic of a SYN flood attack?

What is a characteristic of a SYN flood attack?

• A. It uses legitimate IP addresses for requests
• B. It exploits the TCP three-way handshake with fake IPs
• C. It requires minimal network resources
• D. It results in immediate connection establishment

Answer: (B)

A SYN flood attack is characterized by its exploitation of the TCP three-way handshake process, which is fundamental to establishing a connection between a client and server. In a typical TCP connection establishment, a SYN (synchronize) packet is sent from the client to the server to initiate a connection. The server responds with a SYN-ACK (synchronize-acknowledge) packet, and the client then replies with an ACK (acknowledge) packet. However, in a SYN flood attack, the attacker sends numerous SYN packets to the target server, often using fake or random source IP addresses. Since the server acknowledges these SYN requests, it allocates resources in the form of half-open connections waiting for the final ACK from the supposed clients. As the server gets overwhelmed with these fake requests, it can lead to resource exhaustion, denying legitimate users access to the service. This characteristic of using fake IP addresses allows the attacker to amplify the effect of the attack while making it difficult to trace back to the source. The other choices do not accurately represent the nature of SYN flood attacks. For example, legitimate IP addresses typically indicate traffic that can be traced back to actual users, which contradicts the deceptive strategy of using fake IP addresses. While the attack can require

A SYN flood attack is characterized by its exploitation of the TCP three-way handshake process, which is fundamental to establishing a connection between a client and server. In a typical TCP connection establishment, a SYN (synchronize) packet is sent from the client to the server to initiate a connection. The server responds with a SYN-ACK (synchronize-acknowledge) packet, and the client then replies with an ACK (acknowledge) packet. However, in a SYN flood attack, the attacker sends numerous SYN packets to the target server, often using fake or random source IP addresses.

Since the server acknowledges these SYN requests, it allocates resources in the form of half-open connections waiting for the final ACK from the supposed clients. As the server gets overwhelmed with these fake requests, it can lead to resource exhaustion, denying legitimate users access to the service. This characteristic of using fake IP addresses allows the attacker to amplify the effect of the attack while making it difficult to trace back to the source.

The other choices do not accurately represent the nature of SYN flood attacks. For example, legitimate IP addresses typically indicate traffic that can be traced back to actual users, which contradicts the deceptive strategy of using fake IP addresses. While the attack can require