The prevention of authorized access to a system resource or the delaying of system operations and functions.

Denial of service (DoS) usually refers to an attack that attempts to make a computer resource unavailable to its intended users by flooding a network or server with requests and data. It can also simp [..]

Denial of service (DoS) is a short form for denial-of-service attack. This is a malicious attempt to prevent legitimate users from using a service.

1. The prevention of authorized access to resources or the delaying of time-critical operations. [2382-pt.8] 2. The result of any action or series of actions that prevents any part of an information system (IS) from functioning. [INFOSEC-99]   3.  1.The unauthorized withholding of information or resources [CESG]. 4. The prevention of legitimate acc [..]

A denial of service attack is an effort to make one or more computer systems unavailable. It is typically targeted at web servers, but it can also be used on mail servers, name servers, and any other [..]

DOS (Denial of service) is an attack on computers or networks that restricts or prevents legitimate use. In a DOS attack, an attacker uses a flood of packets to slow down or crash the target system or [..]

The inability of a Web site or other server to respond to legitimate connections. DoS attacks are used to block access to a target Internet site.

Denial of Service (DoS) is an attack where one computer and one Internet connection inundates a targeted system or resource. When an army of remotely controlled computers inundates all your resources, that’s called a Distributed Denial of Service (DDoS) attack. Both types of attacks attempt to prevent internal employees and customers from accessing [..]

A type of network attack that attempts to make a machine or network resource unavailable to users through various vulnerabilities of the infrastructure.

  A Denial of Service (DoS)attack, is an Internet attack against a Web site whereby a client is denied the level of service expected. In a mild case, the impact can be unexpectedly poor performance. In the worst case, the server can become so overloaded as to cause a crash of the system. DoS attacks do not usually have theft or corruption of data a [..]

The attempt to prevent authorized access to a resource or to limit the operability of a system.

A denial-of-service (DoS) attack is an attempt to make a machine or network resource unavailable to its intended users. A DoS attack generally consists of efforts to temporarily or indefinitely interrupt or suspend services of a server host serving mutliple users connected in a network. Perpetrators of DoS attacks typically target sites or services [..]

A DoS attack aims to interrupt or suspend (either temporarily or indefinitely) access to a machine or network from authorised users.

An attack aimed at preventing legitimate users from accessing a computer resource. Denial-of-Service attacks fall into two basic categories: attacks exploiting software vulnerabilities and errors whic [..]

(Acronym – DoS) An attack technique that consumes all of a web site’s available resources with the intent of rendering legitimate use impossible. Resources include CPU time, memory utilization, bandwi [..]

A prevention of the use of information resources either intentionally or unintentionally, which affects the availability of the information resources. Examples of such attacks are SYN flood, Ping O death, packet flooding and Ping flooding.

An attack against a web service aimed at making a particular web-site, resource, or network unavailable to customers, employees, or the public.  DOS and DDoS attacks are caused when a large botnet

Deliberate compromise of availability of information technology systems.

Act of preventing customers, users, clients or other machines from accessing data on a computer. This is usually accomplished by interrupting or overwhelming the computer with bad or excessive informa [..]

Denial of service (DoS) attacks deny service to valid users trying to access a site. Consistently ranked as the single greatest security problem for IT professionals, DoS attack is an Internet attack [..]

A DoS attack is a purposeful blocking or flooding of an internet service with useless traffic. The ill intended gains from such activity could be blackmail or fraud – e.g. blocking access to banking systems for credit card fraud.

Denial-of-service or a DoS attack is an attack on a network that is designed to bring the network to its knees by flooding it with useless traffic. Many DoS attacks, such as the Ping of Death and Teardrop attacks, exploit limitations in the TCP/IP protocols. For all known DoS attacks, there are software fixes that system administrators can install [..]

The unauthorized prevention of authorized access to resources or the delaying of time-critical operations.

Result of any action or series of actions that prevents any part of an information system from functioning.

Denial of Service is the result of an attack by a computer or series of computers on a network, device (such as a firewall) or computer. Personal computers infected with specific Trojans can be used to mount Denial of Service Attacks on other networks or computers, these malicious attacks can be used to extort money from the affected network or com [..]

Denial of service is a security attack that crashes or overloads a critical device (server, router, or firewall) by submitting a large volume of invalid messages.