A Denial-of-Service attack (DoS attack) is an attack that attempts to disable a computer or network, so it is not accessible to its intended users. DoS attacks do this by sending traffic to the target or information that causes a crash. Both DoS attacks deprive legitimate users (i.e., employees, members, or account holders) of the service or resource they expect.
A Denial of Service (DoS) attack is made from a single machine where the attack may be directed to a specific Server, a specific port, or a service on a target. It may also be to the network or any of its components, a firewall or to any other system.
DoS attacks often target high-profile websites such as media, commerce, government, and trade organizations. While DoS attacks are not usually associated with the theft or loss of significant information or other assets, they can be costly to the victim both, money and time-wise.
