By definition, a successful DoS attack denies service, i.e. it degrades or interrupts the availability of a system, application, network, etc. Ultimately what it "accomplishes" depends on the target and the response. It may cost a lot of money, embarrass, threaten, or interfere with the mission of the attacked entity. It may provide notoriety for the attacker or be used to draw attention to the attacker's pet cause. It can provide an advantage to an entity by preventing a competitor from operating. It can also provide obfuscation for another attack occurring at the same time.
it obstructs access to the server target !!
A DOS attack is a denial of service attack. It happens by many computers pinging a website continuously so that the server the website is on is overwhelmed and unable to respond.
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Mission accomplished.
A DoS attack can mimic non-malicious availability concerns like network congestion or a system administrator performing maintenance. The following signs may suggest a DoS or DDoS attack: Irregular network performance with reduced speed Inability to access any website Certain websites turn out to be unavailable Monitoring and analysing network traffic is the most prominent way to identify and evaluate a DoS attack.
DOS attack
to cripple the U.S. naval force in the pacific.
DoS
DOS
Intruders ,attacker,or some time user who want to destroy server and its application. After DoS attack server and their application are not able to respond.
A Denial of Service attack (Abbreviated as DoS).
launch a denial of service (DoS) attack on your computer