DoS

DoS is an acronym for Denial of Service attack. DoS attacks attempt to flood a network with traffic in order to slow response times for legitimate traffic, effectively denying service for legitimate users.

Although a DoS attack does not usually result in the theft of information or other security loss, it can cost the target person or company a great deal of time and money. Typically, the loss of service is the inability of a particular network service, such as e-mail, to be available or the temporary loss of all network connectivity and services. A denial of service attack can also destroy programming and files in affected computer systems. In some cases, DoS attacks have forced Web sites accessed by millions of people to temporarily cease operation.

Common forms of denial of service attacks are:

1-Buffer Overflow Attacks 2-SYN Attack 3-Teardrop Attack 4-Smurf Attack 5-Viruses 6-Physical Infrastructure Attacks

DDoS is a specific type of denial of service attack.