Exploring Cyber security as a hobby and career option (Systems programming)?
Title. Ive been studying systems programming (csapp, ostep, database fundamentals) for a few weeks now and thought id like to explore cyber security since it ties closely to what im learning (heard it on reddit).
What type of different topics are there in cyber security and what books or resources can I study to explore them? Also are certifications necessary in this field as someone who cant afford one?