Certification 12 Electronic data processing personnel Examinations 12 Computer networks 11 Security measures 5 Management 4 Computer security 3 Audio-visual equipment 2 Cisco Systems, Inc 2 Cloud computing 2 Information technology 2 Business enterprises 1 Firewalls (Computer security) 1 Internetworking (Telecommunication) 1 Routing (Computer network management) 1 Wide area networks (Computer networks) 1 Wireless LANs 1