In protocol testing, which characteristic defines an operation that can be retried without changing the final outcome?

In protocol testing, which characteristic defines an operation that can be retried without changing the final outcome?

• A. Latency
• B. Throughput
• C. Privacy
• D. Idempotence

Answer: (D)

Idempotence is the property where applying the same operation multiple times has the same effect as applying it once. In protocol testing, retries happen when messages are lost or delayed, so you want the final state to be unchanged by any duplicate submission. For example, sending a request to set a value to a specific amount should yield that same result even if the request is sent again. Latency measures delay, throughput measures how much work is done over time, and privacy deals with keeping data confidential. These other concepts don’t describe the safety of repeated executions, which is exactly what idempotence guarantees.

Idempotence is the property where applying the same operation multiple times has the same effect as applying it once. In protocol testing, retries happen when messages are lost or delayed, so you want the final state to be unchanged by any duplicate submission. For example, sending a request to set a value to a specific amount should yield that same result even if the request is sent again. Latency measures delay, throughput measures how much work is done over time, and privacy deals with keeping data confidential. These other concepts don’t describe the safety of repeated executions, which is exactly what idempotence guarantees.