When a number of requests exceed the limit of any component of the network, the service will experience a slowdown, limited failure when some of the users were denied service, and complete failure where all users can’t access the website or service at all. Not only the server has a limited bandwidth capacity, the channel that bridges the server to the internet also have a limited capacity. When enough machines are infected to launch an attack (i.e., 1,000 computers), each of them will spam requests to a target website, which will cause extreme slow down and even completely failing the website.Ī DDoS attack exploits the fact that all network resources including web servers have a finite limit to the number of requests that they can service at any given time. This botmaster, on the other hand, will send malware to other vulnerable machines. As mentioned, a DDoS attack differs itself from a simple DoS attack by the fact that it uses armies of infected devices, which are called the ‘botnets’ BotnetĪ classic DDoS attack typically begins with the hacker/attacker exploiting a vulnerable machine and turning it into a botmaster or botnet controller. The objective of a DDoS attack is to prevent legitimate users from accessing a website or network resource, mainly by overwhelming the server with requests. It is suspected that there are tens of millions of machines that have been compromised and used in DDoS attacks, which can include traditional computers to smartphones and even IoT devices. These computers/devices might not know that their resources are used to attempt a DDoS attack, but they have been previously infected with malware and are collectively known as “botnets”. A DDoS attack can involve thousands or even hundreds of thousands of computers. During a successful DoS attempt, regular traffic on the website will be slowed down or completely unavailable.Ī DDoS attack, on the other hand, is a DoS attack that comes from more than one source which is distributed.
DoS VS DDoSĪ Denial of Service attack is any attempt/attack that is aimed at making the web resource unavailable to its users (denying service, hence the name), mainly by flooding the website’s URL with so many requests that the server can handle. DDoS refers to Distributed Denial of Service, and before we can explain DDoS, we have discussed another term that is often used interchangeably with DDoS, which is DoS (Denial of Service).
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