問題文
One host talks to a single outside address every ten minutes, always sending about the same number of bytes, day and night. Which reading fits that shape best?
選択肢
- A program asking for instructions on a fixed cycle, because the regularity is set by a timer rather than by a person at a keyboard.
- A copy of material leaving the estate, because a transfer that is broken into parts sends each part at the same size.
- A person working late on a task, because a task that takes all night produces a long series of requests of the same kind.
- A product checking for updates, because a check of that sort repeats on a cycle and asks the same question every time.