What is TCP/IP?

• A. A proprietary vendor protocol
• B. A real world implementation of a networking stack and is the protocol stack used on the internet (App, transport, network, data link)
• C. A single protocol used for sending emails
• D. A hardware standard for Ethernet cables

Answer: (B)

TCP/IP is a suite of protocols that forms the networking stack used on the Internet. It defines how data is organized, addressed, transmitted, routed, and received across networks, and it’s implemented in a layered model: applications use high‑level protocols (like HTTP or SMTP), the transport layer provides reliable or best‑effort delivery with TCP or UDP, the internet layer handles addressing and routing with IP, and the link layer manages local network transmission. This description captures both the real‑world, interoperable nature of the stack and its role as the foundational protocol suite for virtually all Internet traffic. It isn’t a proprietary vendor protocol, it isn’t a single protocol for emails, and it isn’t a hardware standard for Ethernet cables.