Examinations 34 Certification 31 Electronic data processing personnel 29 Computer networks 21 Computer security 8 Management 7 Security measures 6 Linux 5 Operating systems (Computers) 5 Cloud computing 4 Information technology 4 Cisco Systems, Inc 3 Project management 3 VMware vSphere 3 Virtual computer systems 3 Access control 2 Amazon Web Services (Firm) 2 Audio-visual equipment 2 Client/server computing 2 Internetworking (Telecommunication) 2 Red Hat, Inc 2 Routing (Computer network management) 2 Switching systems 2 Systems engineering 2 Telecommunication 2 VMware 2 Web services 2 Business enterprises 1 Computer technicians 1 Data transmission systems 1