
72 Essentials of Cloud Computing
maintained by the service providers. The physical infrastructure can be
maintained by the service providers themselves. Thus, it eliminates or
hides the complexity of maintaining the physical infrastructure from the
IT architects. A typical IaaS provider may provide the owing services as
shown in Figure 5.5:
1. Compute: Computing as a Service includes virtual central processing
units (CPUs) and virtual main memory for the VMs that are provi-
sioned to the end users.
2. Storage: STaaS provides back-end storage for the VM images. Some of
the IaaS providers also provide the back end for storing les.
3. Network