Denial of Service Attacks (DOS)

What it is
A denial-of-service (DoS) is any type of attack where the hackers attempt to prevent genuine users from accessing the service. 

How it Works
In a DDoS attack, the attacker usually sends excessive messages asking the network or server to authenticate requests that have invalid return addresses. 

How a network Manager Might Prevent an Attack
You can prevent DOS attacks with dotDefender web application firewall. You can avoid DoS attacks because dotDefender inspects your HTTP traffic and checks their packets against rules such as to allow or deny protocols, ports, or IP addresses to stop web applications from being exploited.

The Difference Between DOS and DDOS

The difference between DOS and DDOS is in the origin of the attack.

• A denial of service (DOS) attack comes from a single person or network.
• A distributed denial of service attack (DDOS) will involve computers from networks all over the world. (Distributing the attack amplifies it, and it also makes it more difficult for the affected party to protect itself.)