Read the short case below and Briefly answer ALL the related ques tions $(31$ Points$)$

Salesforce.com is an American cloud computing company that was founded in $1999$ by four former Oracle executives as a company specializing in software as a service $($SaaS$).$

As of early $2016,$ it was considered as one of the most highly valued American cloud computing companies with a market capitalization above $$55$ billion.

Salesforce primary enterprise offering is the customer relationship management $($CRM$)$ product, sold by monthly subscription within the SaaS software distribution model.

Page $5-$f $9$

Salesforce CRM provides companies with an interface for case management and task management, and a system for automatically routing and escalating important events. The Salesforce customer portal provides customers the ability to track their own cases, includes a social networking plug$-$in that enables the user to join the conversation about their company on social networking websites, provides analytical tools and other services including email alert, Google search, and access to customers' entitlement and contracts.

To note, Cloud Software as a service $($SaaS$)$ is a software distribution model in which a third$-$party provider hosts applications and makes them available to customers over the Internet. By definition, SaaS removes the need for organizations to install and run applications on their own computers or in their own data centers. This eliminates the expense of hardware acquisition, provisioning and maintenance, as well as software licensing, installation and support. In addition, other benefits of the SaaS model include lower and more flexible payments, scalable usage, automatic updates, and more convenient Accessibility and persistence.

Salesforce SaaS platform is in line with the industry standard and thus is closely related to the ASP $($application service provider$)$ and on demand computing software delivery models. In fact, the hosted application management model of SaaS is similar to ASP: the provider hosts the customer's software and delivers it to approved end users over the internet.

Nevertheless, business relying on companies like Salesforce which is primary specializing in SaaS, also poses some potential disadvantages. For instance, such businesses would be relying on outside vendors $($such as Salesforce$)$ to provide the software, keep that software up and running, track and report accurate billing and facilitate a secure environment for the business' data.

For instance, providers that experience service disruptions would then impose unwanted changes to all service offerings, and business relying on their services would potentially experience similar disruptions.

How does the SaaS model differ from the typical Enterprise software system?