/sci/ - Science & Math

Third year electric engineering student here. Didn't get an internship this year because I was too lazy and my GPA isnt too hot right now. I figured I should do something useful this summer and came across the idea of getting some certs since I figured they would look good on the resume. Did some looking around and Comp TIA Security+ seems like the most useful a beginner can get for decently cheap. I know close to nothing about cybersecurity though, but I have all summer to study. I was told that the A+ security cert was kinda useless compared to this one. Would /sci/ happen to have any pointers or learning resources? I've been told that they expect me to have some prior networking knowledge like ports and stuff which I dont so resources for those would be appreciated too

Is there any application of number theiry outside of algebra? Sone creepy old guy once told me about connections to statistics an prob theory, but I couldn't understand him