Examinations 518 Computer networks 485 Certification 459 Electronic data processing personnel 373 Study guides 169 Telecommunications engineers 102 Routers (Computer networks) 59 Internetworking (Telecommunication) 49 Microsoft software 37 Telecommunication 24 Switching systems 19 Microsoft Windows server 18 Operating systems (Computers) 15 Computer technicians 14 Software configuration management 13 Microsoft Windows (Computer file) 12 Security measures 11 Local area networks (Computer networks) 10 Study and teaching 10 TCP/IP (Computer network protocol) 10 Technology 10 Java (Computer program language) 7 Remote access 7 Business enterprises 6 Packet switching (Data transmission) 6 Wide area networks (Computer networks) 6 Computer security 5 Computers 5 Microcomputers 5 Problems, exercises, etc 5