What comprises an Infrastructure as a Service $($IaaS$)$ model?

third$-$party improvements with software and hardware, which are difficult to offer when hosted internally

Incorrect

If a company is not hosting internally, these services are more directly referring to a SaaS cloud environment.

increased speed and virtualization for an organization

third$-$party provider that hosts, services, and maintains all aspects of the system on behalf of the end user

increased help on logic and coding issues for an organization's proprietary system