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Distributed Denial-of-Service (DDoS)
Distributed Denial-of-Service, or more commonly known in its abbreviated form – DDoS – is an organized attempt to render a computer resource obsolete and unavailable to its intended users – temporarily or indefinitely. Specifically, a DDoS attack consists of the concerted efforts of a person or an organization to prevent an Internet website or service from functioning efficiently, or even at all. When a DDoS attack is successful, enterprises with core revenue-generating functions residing over the Internet will suffer great losses in the forms of: short-term financial losses, long-term reputational losses, or even permanent business disability.
DDoS attacks can be classified into two broad categories – Bandwidth Depletion Attacks or Resource Depletion Attacks.
Bandwidth Depletion Attacks are characterized by which a victim network is flooded with large volume of bogus packets that overwhelms the network’s bandwidth capacity. The aim is to consume network bandwidth of the targeted network to such an extent that it starts to drop packets. An inevitable result would lead to legitimate traffic being dropped as well, thus denying valid users access to that particular service.
Resource Depletion Attacks involves the attackers sending packets that misuses network protocol communications, or via sending malformed packets that tie up network and/or system resources so that none are left for legitimate users. The aim is to occupy and jam up the limited resources so that it is unable to handle any other requests.
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