Most simplest explanation — What is DOS(Denial-of-service) attack? The attacker machine keeps sending traffic to the server and eventually the server cannot handle it anymore because it is fooled by the traffic, so the server goes down. What is DDOS(Distributed-Denial-of-service) attack? Using his commanding server, the attacker uses a bot army to attack a single destination. How does an attacker build an army of bots?
