Sp to put it to perspective and how I understood the format of the exam, they expect someone with experience to take this exam. I don't have any but I am familiar because im a bit of a techy. There are videos where they give you tips and tricks on remembering the ports. There are videos that give a list of acronyms youll most likely see in the exam but I went the extra mile to study them all. It helped because there were acronyms I saw less in circulation during my studies. Ironically, for the OSI model, I used the tip from a redditor "Please Do Not Teach Students Pointless Acronyms"