Switching systems Telecommunication 44 Examinations 30 Certification 24 Computer networks 17 Electronic data processing personnel 17 Engineering & Applied Sciences 17 Electrical & Computer Engineering 16 Telecommunications 16 Telecommunications engineers 16 Routing (Computer network management) 15 Local area networks (Computer networks) 8 Internetworking (Telecommunication) 7 Cisco IOS 4 Cisco Systems, Inc 4 Computer Science 3 Routers (Computer networks) 3 Data transmission systems 2 Routing(Computer network management) 2 Computer network architectures 1 Computer network protocols 1 Design and construction 1 Equipment and supplies 1 Ethernet (Local area network system) 1 Examination 1 Microwave communication systems 1 Optical communications 1 Packet switching (Data transmission) 1 Redes locales (Redes de ordenadores) 1 Security measures 1