According to IDC, the fastest growing sector in the new cloud IT market is Infrastructure as a service (IaaS). This consists of providing users virtual machines and other resources to manage tasks over the Internet, and it's scalable to the user's needs. Additional services offered over the cloud include firewalls, load balancers, IP addresses, virtual-machine disk image library, raw (block) and file-based storage, virtual local area networks (VLANs), and software bundles. With IaaS, the cost will reflect the resources allocated and consumed, making it an attractive option for businesses wanting to take advantage of these services without having to purchase and maintain their own IT infrastructure.