Computer networks Examinations 78 Certification 65 Electronic data processing personnel 59 Security measures 40 Computer security 29 Computer technicians 13 Management 13 Telecommunications engineers 11 Routing (Computer network management) 9 Computing Technology Industry Association 6 Penetration testing (Computer security) 5 Design and construction 4 Information technology 4 Linux 4 Microsoft Windows server 4 Operating systems (Computers) 4 Cisco Systems, Inc 3 Cloud computing 3 Computer network protocols 3 Hackers 3 Internetworking (Telecommunication) 3 Microsoft Windows (Computer file) 3 Cisco IOS 2 Cisco career certification 2 Computer software 2 Data encryption (Computer science) 2 Engineering & Applied Sciences 2 Maintenance and repair 2 Microcomputers 2