Knowledge Center

What Is A DoS Attack?

DoS Attack

Denial-of-service (DoS) is a cyber-attack that occurs when a perpetrator attempts to disrupt the internet services of a host computer. The attacker attempts to flood the targeted machine with multiple requests in an effort to overload the system and prevent user requests from being fulfilled.

DDoS

A more severe type of DoS attack is known as a distributed denial-of-service (DDoS) attack. The flooding of the targeted machine originates from several different sources, thereby making it impossible to stop the attack merely by blocking a single source.

A DDoS attack is similar to a large crowd of people standing in front of the entryway to an amusement park. Legitimate customers who have tickets to the park are unable to enter because of the crowd.

Criminals who instigate DoS attacks prefer to target sites hosted on high-profile web servers. Examples include banks, brokerage firms, credit card payment centers, and other financial institutions. Once the attack has been set in motion, blackmail usually follows.

DoS attacks have been in existence since the advent of the internet. According to internet historians, the first DoS attack occurred on September 6, 1996. A website by the name of Panix was attacked by a single perpetrator. The website was shut down for several days until a team of experts was able to eliminate the denial of service.

Although DoS attacks still occur in today’s cyber world, they are much less prevalent compared to 25 years ago when the world wide web was in its infancy stage. Sophisticated protocols have been put in place to dramatically reduce such attacks.

Brief Summary of DoS Attack

  • DoS is an acronym for denial-of-service.
  • Occurs when a perpetrator attempts to disrupt the internet services of a host computer.
  • The goal of the attacker is to prevent legitimate users from accessing the system.
  • DDoS is the most severe type of DoS attack.
  • DDoS is an acronym for distributed denial-of-service.
  • Occurs when flooding of the targeted machine originates from many different sources.
  • Criminals who instigate DoS attacks prefer to target high-profile web servers.
  • Examples include banks, brokerage firms, and credit card payment centers.
  • Blackmail is usually the driving motivation behind the attack.
  • According to internet historians, the first DoS attack occurred on September 6, 1996.
  • DoS attacks are much less prevalent compared to 25 years ago. Sophisticated protocols have been put in place to reduce such attacks.
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