Chapter $9$:

$1.$ Please explain the function and mechanism $($how it works$)$ of Software as a Service $($SaaS$),$ a popular e$-$commerce branch. Please give three examples of SaaS from real life and the components of the packages they offer.

Chapter $10$:

$2.$ Please explain what a botnet is$,$ how it works and where and how it can cause damage.

$3.$ Please explain what a sniffer program is$,$ how it works and how it can be used for good and bad deeds.

Chapter $11$:

$4.$ Please explain the function of payment providers, how they generate revenue for themselves, and what is advantageous about eBay owning PayPal.

Chapter $12$:

$5.$ Please come up with a one paragraph return of investment $($ROI$)$ discussion of an investment you would like to make for your e$-$commerce company. Please discuss its advantages and disadvantages of your $($fictitious$)$ investment. Next, please explain in what cases ROI may be a bad tool rather than being realistic or on target