To get certified as CompTIA Security+, you need to clear the SY0-501 exam (newer version; SY0-601). To clear this certification exam, you can take the help of multiple resources like books, whitepapers, online resources like test papers, practice sessions, and many other free and paid resources. But the best of them all is taking up CompTIA Security+ Certification from a recognized training institute. Also, you can check out the YouTube video on the Cyber Security course to help you with the basics.