A service attack refers to a malicious and intentional act of overwhelming or disrupting a computer network, website, or online service, rendering it temporarily or permanently inaccessible to its intended users. Full definition
It was a distributed denial - of - service attack on a major internet services provider. (sciencedaily.com)
The use of secret back - up servers will be copied to defend against distributed denial of service attacks. (politics.co.uk)
Neither Check Point nor Qihoo is certain what the attacker's intentions may be, but if history provides any insight, it's not unreasonable to expect that the botnet could unleash overwhelming barrages of distributed denial of service attacks against targets of its botmaster's choosing. (fortune.com)