Denial-of-service attack

DDoS Stacheldraht Attack diagram. Perpetrators of DoS attacks typically target sites or services hosted on high-profile web servers such as banks, credit card payment gateways, and even root nameservers. DoS threats are also common in business,[1] and are sometimes responsible for website attacks.[2] This technique has now seen extensive use in certain games, used by server owners, or disgruntled competitors on games, such as server owners' popular Minecraft servers. Denial-of-service attacks are considered violations of the Internet Architecture Board's Internet proper use policy, and also violate the acceptable use policies of virtually all Internet service providers. Symptoms and manifestations[edit] The United States Computer Emergency Readiness Team (US-CERT) defines symptoms of denial-of-service attacks to include: Methods of attack[edit] A denial-of-service attack is characterized by an explicit attempt by attackers to prevent legitimate users of a service from using that service.

Khan Academy Inside Google pictures gives first ever look at the 8 vast data centres Data centres range from vast warehouses in Iowa to a converted paper mill in FinlandBuildings are so large Google even provides bicycles for engineers to get around themStreet View tour of North Carolina facility reveals Stormtrooper standing guard By Mark Prigg Published: 18:22 GMT, 17 October 2012 | Updated: 14:55 GMT, 19 October 2012 Google has given a rare glimpse inside the vast data centres around the globe that power its services. They reveal an intricate maze of computers that process Internet search requests, show YouTube video clips and distribute email for millions of people. With hundreds of thousands of servers, colourful cables and even bicycles so engineers can get around quickly, they range from a converted paper mill in Finland to custom made server farms in Iowa. Scroll down for video The online gallery reveal the interior of eight of Google's secretive server farms around the globe, from Finland to Iowa Google's major data centers are located in: