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 ?
These awards will mainly focus on three areas: Measurement and Analysis to Promote Best Current Practices, which aims to slow the growth rate in denial of service attacks and to make existing attacks more difficult by promoting the deployment of existing best practices.
We have seen distributed denial of service attacks against individual journalists and against individual news outlets increasing over the last few years," Robert Mahoney, the rights group's deputy director, told reporters.
This means the cryptographic process is somewhat more vulnerable to Denial of Service attacks than schemes that identify sources based upon the readily available IP address or host-name.
It's anyone's guess why this virus writer is targeting these websites with a denial of service attack.
SCO last week confirmed that it was the victim of a denial of service attack and claimed that it had notified the Federal Bureau of Investigation for assistance.
Respondents displayed the prowess of a new form of denial of service attacks, called distributed denial of service attacks (DDOS).
DDoS attacks occur when many hosts act in a cooperative manner to perform a joint denial of service attack, increasing the potential for overrunning the network dramatically.