TCP/IP (Computer network protocol) 692 Computer networks 202 Internetworking (Telecommunication) 74 Internet 53 Routers (Computer networks) 50 Internet telephony 40 Management 39 Examinations 36 Certification 34 Security measures 29 Study guides 29 Local area networks (Computer networks) 26 Electronic data processing personnel 25 Computer network protocols 22 Wireless communication systems 22 Microsoft software 21 Mobile computing 20 Design and construction 19 Operating systems (Computers) 19 Internet addresses 18 Data transmission systems 14 Embedded computer systems 13 Internet programming 13 Telecommunication 12 Network performance (Telecommunication) 11 Client/server computing 10 Wireless Internet 10 Asynchronous transfer mode 9 Digital telephone systems 9 OSI (Computer network standard) 9