Which term describes the global system of networks that uses TCP/IP protocols to transmit data?

• A. Extranet
• B. Intranet
• C. Intranet VPN
• D. Internet

Answer: (D)

Think about a global framework that connects countless networks together and uses a single, universal set of rules to send data. This universal set of rules is the TCP/IP protocol suite, which breaks data into packets, numbers them, and routes them across different networks so it can reach any connected device. That broad, worldwide connectivity is what the Internet provides—the global system of networks that transmits data using TCP/IP.

An intranet is a private network inside an organization, an extranet extends that private network to selected outsiders, and an intranet VPN refers to securely connecting into a private network over the public internet. These are restricted in scope, whereas the Internet itself is global and open to interconnect with many networks. Hence, the term that fits best is the Internet.