Unified communications as a service (UCaaS) packages a diversity of communication applications and services such as voice, email, messaging, conferencing and other collaborative services under the same service provider. This is more than just hosted VOIP!
CCAAS in a cloud based environment provides call management for highly trafficked inbound or outbound centers.
BAAS is a service that offers a system for the backup, storage, and recovery of computer files to its users.
DRAAS is used for protecting an application or data from a natural or human disaster or service disruption at one location by enabling a full recovery in the cloud.
Managed public cloud offers multi-cloud resources and management on compliant service delivery frameworks.
IAAS offers flexibility in resource management in the cloud with usage based payment options allowing businesses to essentially rent the infrastructure. Some examples of this are remote data centers, load balancing, networking, and storage.