A SYN flood is a Denial of Service attack that overwhelms a server’s ability to to respond by sending a flood of what kind of network traffic?
Question
A SYN flood is a Denial of Service attack that overwhelms a server’s ability to to respond by sending a flood of what kind of network traffic?
Solution
A SYN flood is a Denial of Service (DoS) attack that overwhelms a server's ability to respond by sending a flood of TCP (Transmission Control Protocol) network traffic.
Here's a step-by-step explanation:
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The SYN flood attack begins with the attacker sending multiple SYN (synchronize) packets to the target server's IP address, from spoofed IP addresses.
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Each of these packets is handled like a connection request, causing the server to send back a SYN-ACK (synchronize-acknowledge) packet to the IP address of the supposed client, and then wait for an ACK (acknowledge) packet in response.
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Because the IP addresses are spoofed, the ACK responses never come. This leaves a large number of connections half-open, consuming resources on the server.
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If the attacker sends these SYN packets rapidly enough, the server can run out of resources to handle legitimate traffic, resulting in a denial of service.
Similar Questions
SYN Flood is a DOS attack in which an attacker deliberately violates the three-way handshake and opens a large number of half-open TCP connections. The signature of attack for SYN Flood contains:Select one:a. The source and destination address having the same valueb. A large number of SYN packets appearing on a network without the corresponding reply packetsc. A large number of SYN packets appearing on a network with the corresponding reply packetsd. The source and destination port numbers having the same value
A security team investigates a server that has been overwhelmed with SYN packets. What does this scenario describe?1 pointSYN flood attackICMP flood attackPing of DeathOn-path attack
TCP SYN Flood attack uses the three-way handshake mechanism.1. An attacker at system A sends a SYN packet to victim at system B.2. System B sends a SYN/ACK packet to victim A.3. As a normal three-way handshake mechanism system A should send an ACK packet to system B, however, system A does not send an ACK packet to system B. In this case clientB is waiting for an ACK packet from client A.This status of client B is called _________________Select one:a. "full-open"b. "half-closed"c. "half open"d. "xmas-open"
Select the DDoS attack type described in each scenario.Send a large number of ICMP echo request packets to a server without waiting for replies (ICMP flood attack).Send a large number of SYN requests to a server but not acknowledging the server's SYN-ACK responses (SYN flood attack).Send a large number of UDP packets to random ports on a server (UDP flood attack).Send a large number of HTTP requests to force a web server to search for un-cached content.
Question 1What type of attack uses multiple devices or servers in different locations to flood the target network with unwanted traffic?1 pointDistributed Denial of Service (DDoS) attackDenial of Service (DoS) attack Phishing attackTailgating attack2.Question 2What type of attack poses as a TCP connection and floods a server with packets simulating the first step of the TCP handshake?1 pointICMP flood SYN-ACK flood attackOn-path attackSYN flood attack3.Question 3Fill in the blank: The Denial of Service (DoS) attack _____ is caused when a hacker sends a system an ICMP packet that is bigger than 64KB.1 pointPing of DeathSYN flood On-pathICMP flood4.Question 4Which types of attacks take advantage of communication protocols by sending an overwhelming number of requests to a server? Select all that apply.1 pointICMP flood attackSYN flood attackTCP connection attackTailgating attack
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