denial of service attack


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denial of service attack

An assault on a network that floods it with so many requests that regular traffic is either slowed or completely interrupted. Unlike a virus or worm, which can cause severe damage to databases, a denial of service attack interrupts network service for some period.

Distributed Attack
A distributed denial of service (DDOS) attack can employ hundreds or even thousands of computers that have been previously infected. The computers act as a network of "zombies" working together to send out bogus messages, thereby creating huge volumes of phony traffic.

In 2016, the Dyn DNS system was hammered by a DDOS attack that caused sporadic slowdowns of major sites such as Twitter, Netflix and The New York Times. The zombie traffic reached more than 100 gigabytes per second of bogus messages. See botnet, smurf attack, SYN flood attack, land attack, teardrop attack and Ping of Death.


It's Not a New Phenomenon
In February 2000, computers were activated that had been previously hacked and planted with illicit programs. The unending number of requests caused a denial of service at Yahoo, eBay, Amazon.com and other websites. (Article headline courtesy of the Philadelphia Inquirer.)
References in periodicals archive ?
The most sophisticated denial of service attacks use botnets - networks of 'zombie computers' - consisting of numerous malware-infected computers that are thus available to cybercriminals who control them remotely.
According to British law enforcement, Bessell operated primarily out of his home in Toxteth, Liverpool, where he commanded a virtual army of more than 9,000 computers and internet-connected devices that allowed him to carry out denial of service attacks.
A denial of service attack happens when hackers attempt to prevent people from using a service by bombarding it with traffic.
According to the paper, US financial group Capital 1 is also understood to have been hit by a similar denial of service attack at the same time as HSBC.
A group of computer hackers claimed responsibility for what appeared to be a denial of service attack last night, which left users unable to fully access the department's homepage for several hours.
1.2 The Classification of distributed denial of Service Attack
He faces one further charge of conspiring to carry out a distributed denial of service attack - where a website is flooded with traffic to make it crash - on SOCA.
Well, simply put, in a denial of service attack, the attacker sends repeated messages to a target website with such frequency, that the website can not keep up and slows to a crawl, in effect taking it offline.
The site, which distributed a trove of US diplomatic documents on Sunday, said in a Twitter message on Tuesday morning that it was under a "distributed denial of service attack," a method commonly used by hackers to slow down or bring down sites.
A denial of service attack means that unprecedented traffic is being sent to the sites, causing the servers minor meltdowns.
"A small percentage of Blogger users have experienced error messages this afternoon as the result of what appears to be an ongoing distributed denial of service attack aimed at multiple services across the web," a Google spokesman said via e-mail.
A message posted on the Twitter blog said the short messaging site was the target of a "denial of service attack".