There are nine main skills the CompTIA A+ certification validates, they are;
Hardware identification and consolidation
Installing operating systems including Mac OS, Linux, Windows OS and Mobile OS.
Software troubleshooting
Network and connection development including TCP/IP, WIFI and SOHO
Hardware and Network troubleshooting
Instilling strong security protocols and combating vulnerabilities
Introducing and configuring mobile devices including laptops
Introducing virtualization and cloud computing
Implementing the best practices for operational procedures