Computer networks Security measures 57 Computer security 54 Data transmission systems 33 Internet 26 Electronic commerce 17 Data encryption (Computer science) 16 Business enterprises 15 Computer science 14 Information technology 14 Management 14 Wireless communication systems 12 Coding theory 11 Computer crimes 11 Local area networks (Computer networks) 11 Communication 9 Computers 9 Internet (Computer network) 9 TCP/IP (Computer network protocol) 9 Computer network protocols 8 Big data 7 Cloud computing 7 Computer network architectures 7 Internetworking (Telecommunication) 7 Telecommunication 7 Data processing 6 Law and legislation 6 Multimedia systems 6 Operating systems (Computers) 6 Queuing theory 6