This unit includes thing like hacking, emails, VOIP, and internet security. My Unit 1 was very detailed and was very difficult at times but once you get your head around it, it is much easier to do but it all takes time and effort but you have to apply yourself, if you really want to learn it you dont just learn it over night it takes a while but is very helpful to know, this has all helped me personaly as well as having to know about it in school.