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 ?
What distinguishes this case from the recent epidemic of denial of service attacks is its focus," said Rodney R.
The event marks Secure64's first-ever public demonstration of SourceT - a software technology that makes mission-critical enterprise applications immune to compromise from the growing threats of rootkits and malware, and resistant to denial of service attacks.
While denial of service attacks have existed for many years, technology advances allow coordinated automated attacks from many computers at once thereby increasing the risk for Web sites.
March 30 Presentation to Explain the Growing Threat Posed by Denial of Service Attacks and How Automated Security Appliances Can Accurately Block Such Assaults
Headline of release should read: Latest Tumbleweed Dark Traffic Report Shows 300% Rise In Denial of Service Attacks (sted Latest Tumbleweed Dark Traffic Report Shows 300% Rise in Directory Harvest Attacks).
He was also the expert called in to help the judge understand distributed denial of service attacks at the MafiaBoy trial.
Ixia's DDoS test suite emulates a wide a range of Denial of Service attacks, including TCP SYN flood, Ping of Death, and port scans, making it easier to guard an IP network, and to speed the deployment of high quality services to subscribers, thus reducing the risk of revenue interruption for Carriers and Service Providers.