Well if you're doing networking you'll probably have to learn some linux, a lot of cisco/ios, maybe some sql but its easy. Depends on what you end up doing specifically really, looking back I wish I had gotten into linux/bash scripting earlier so I would be in a better position today. Imma get my CEH here in a month or so, stupid waste of time cert but it checks off a box and recruiters look at it. Then starting on the Red Hat cert path and might go for the VMware cert if I can stomach spending 3k on a fucking cbt course.