Which of the following is NOT true regarding network protocols?

Question

BlackTom AI · Accepted Answer

Network protocols are a set of agreed rules and conventions that govern how devices format, send, receive and interpret data across a network.

1) Relevant knowledge points and concepts
- Protocol: rules for communication (syntax, semantics, sequencing, error handling). Examples: TCP/IP (transport and internet-layer rules), 802.11 (wireless LAN protocol family), and Ethernet (which includes frame formats and link-layer behavior).
- Physical medium (cabling, fiber, wireless): the physical connection or transmission medium itself is distinct from the abstract rules/protocols that govern communication over that medium.

2) Step-by-step reasoning
- Option a: “It can be described as the language spoken on the network.” This is a correct analogy—protocols are like languages enabling devices to understand each other.
- Option b: “It includes Ethernet, TCP/IP and 802.11.” These are standard protocol suites and are correctly listed as examples.
- Option d: “It is a set of rules... to allow devices on the same network to communicate.” That matches the definition of a protocol.
- Option c: “It refers to the use of physical cabling to connect devices to a network.” This describes physical media or cabling/connection methods, not the protocols themselves. Although some protocols specify physical-layer characteristics (e.g., certain Ethernet standards include physical layer specifications), saying that a protocol “refers to the use of physical cabling” is misleading and incorrect: protocols define rules for communication, while cabling is the medium or infrastructure.

3) No calculations required.

4) Why the correct answer is correct
Option c is incorrect because it confuses the physical medium (cabling) with the rules (protocols). Protocols may operate over cabling or wireless links, but they are not the cabling itself.

5) Why other options are incorrect (brief)
- a, b, and d accurately describe what protocols are or give valid examples, so they are true.

Conclusion: The statement that is NOT true is option c. This matches the provided correct answer: c.

Which of the following is NOT true regarding network protocols?Single choice

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