Certification 59 Telecommunications engineers 58 Examinations 47 Study guides 31 Computer networks 28 Internetworking (Telecommunication) 12 Wireless LANs 9 Security measures 7 Management 5 Problems, exercises, etc 4 Computer security 3 Firewalls (Computer security) 3 Internet 3 Electronic data processing personnel 2 Extranets (Computer networks) 2 Internet telephony 2 Multicasting (Computer networks) 2 Packet switching (Data transmission) 2 Remote access 2 Switching systems 2 Telecommunication 2 Electronic data processing 1 Examination 1 Study guide 1 Telecommunication engineers 1