What is the correct way to present a case study?

I have to write and submit my first case study for my college course but have not been given any guidence on how to present it (for example, should it have an introduction, and a conclusion just like a standard essay?).

Any helpful pointers would be gratefully received.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).