What is DDos Attack?

What is a DDoS attack ?
A DDoS is stand for distributed denial of service. A DDos attack is a malicious attempt to bring down a website aor a web server by overloading its bandwidth. The Hackers can attacks by remotely instructing a group of infected computers, known as a botnet, to repeatedly contact a website server.

This sudden surge in web traffic can cause a website to work slowly or sutdown completely. Hackers use malware and trojan viruses to bring PCs into the botnet. Many people have no idea that their computer has been sabotaged in this way, though they may notice that it doesn't as well as it used to. A most DDos attack come from cybercriminal gangs, rouge hacker, or countries's secret service

Is there difference between DDOS and DOS attack ? Yes, the important word is "distributed", which describes large attacks that use thousands of infected PCs. Lacking this scale of attack, small strikes from a single host computer are classified as Dos attacks. Hacker use thousands PSc for simple reason that the amount of traffic aimed at one website will increased by manipilating more machines. Some botnets are massive such as Bredolab and Conflickers have millions of PCs in them (webuser magz)