The dependability of each network link is called what?

• A. Bandwidth
• B. Delay
• C. Reliability
• D. Load

Answer: (C)

Reliability is about how dependable a network link is—the likelihood that it will work when needed and carry traffic without being disrupted. It captures uptime, fault frequency, and how quickly issues are resolved; a highly reliable link minimizes outages and performance interruptions, often through redundancy, good hardware, error handling, and proactive monitoring. This concept matters for ensuring consistent communication and performance, especially in networks that require steady access and minimal downtime.

Bandwith refers to the maximum rate at which data can be transmitted over the link, not how often the link stays up. Delay, or latency, is the time it takes for data to travel from sender to receiver. Load describes how much traffic the link is carrying at a given moment. While these factors affect performance, reliability specifically concerns the steady, dependable operation of the link over time.