9.1 DoS/DDoS Concepts

What is a Denial-of-Service Attack?

  • Denial of Service (DoS) is an attack on a computer or network that reduces, restricts or prevents accessibility of system resources to its legitimate users.
  • In a DoS attack, attackers flood a victim system with non-legitimate service requests or traffic to overload its resources.
  • DoS attack leads to unavailability of a particular website and show network performance.

What are Distributed Denial of Service Attacks?

  • A distributed denial-of-service (DDoS) attack involves a multitude of compromised systems attacking a single target, thereby causing denial of service for users of the targeted system.
  • To launch a DDoS attack, an attacker uses botnets and attacks a single system.

How Distributed Denial of Service Attacks Work

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