Denial of Service attack
A Denial of Service is a type of attack to make services unavailable for an indefinite period of time of an user or an organization. It is mostly attacks against servers of a company, so they can be used and consulted.
The purpose of such attack is not to retrieve or alter data, but damages the reputation of companies with a web presence and possibly affects the performance if their activity is based on an information system. An example of Denial of Service, attack on a server computer designed to prevent him from fulfilling its function. The classic method is to bring down the server under a mass of malformed requests usually purposely to cause an abnormal response and paralyzing.
There are usually two types of denial of service:
- Denial of Service DDoS comprising overwhelm a machine queries, so it is no longer able to meet the actual queries.
- Denial of service vulnerability exploitation, of exploiting a flaw in the remote system to make it unusable.