Professional Disaster recovery as a service (DRaaS) is a cloud computing and backup service model that uses cloud resources to protect your business applications and data from disruption caused by any type of disaster. It gives your business a total system backup that allows for business continuity in the event of system failure. This include data protection and virus / malware detection and removal. Payment is usually based on a monthly fee structure, governed by a 12-24 month service level agreement (SLA) concluded between the client and the service provider, with the contract including monhtly maintenance and support.