DoS vs. DDoS attacks

A DoS attack floods a server with traffic, making a website or resource unavailable. A distributed denial-of-service (DDoS) attack is also a DoS attack that uses multiple computers or machines to flood a targeted resource. Both types of attacks overload a server or web application with the goal of interrupting services. As the server is flooded with more TCP/UDP packets than it can process, it may crash, the data may become corrupted, and resources may be misdirected or even exhausted to the point of paralyzing the system.

· DOS (Denial of Service) Attack: In this attack a computer sends a massive amount of traffic to a victim’s computer and shuts it down. Dos attack is an online attack that is used to make the website unavailable for its users when done on a website. This attack makes the server of a website that is connected to the internet by sending a large number of traffic to it.

· DDOS (Distributed Denial of Service) Attack: In this attack dos attacks are done from many different locations using many systems.

Differences between DOS & DDOS Attacks

· In DOS attack single system targets the victim system but in DDOS multiple systems attacks the victims’ system.

· So in DOS attack victim PC is loaded from the packet of data sent from a single location but in DDOS attack the packet of data sent from Multiple location.

· DOS attack is slower as compared to DDOS.

· DOS attacks can be blocked easily as only one system is used. But DDOS attack is difficult to block because multiple devices are sending packets and attacking from multiple locations.

· In DOS Attack only single device is used with DOS Attack tools but in DDOS attack, the volumeBots are used to attack at the same time.

· When compare with DDOS attacks, DOS attacks are easy to trace.

· Volume of traffic in the Dos attack is less as compared to DDOS. DDOS attacks allow the attacker to send massive volumes of traffic to the victim network.

Types of DOS Attacks:

1. Buffer overflow attacks
2. Ping of Death or ICMP flood
3. Teardrop Attack
4. Flooding Attack

Types of DDOS Attacks:

1. Volumetric Attacks
2. Fragmentation Attacks
3. Application Layer Attacks
4. Protocol Attack.