問題文
An engineer exchanges a part inside a branch router while it carries traffic, and reads how the two ways of doing it differ. Which statement is correct?
選択肢
- The way called OIR and the way called hot-swapping are two names for one and the same thing, and hardware alone will do in either case.
- The way called OIR and the way called hot-swapping both need a command typed before the part comes out, and hardware alone will do for what comes after it goes in.
- The way called OIR calls for a command typed before the part comes out and a second one after it goes in, while hot-swapping is a matter of hardware and asks for nothing of the kind.
- The way called hot-swapping needs a command typed before the part comes out and another after it goes in, while OIR is a matter of hardware and asks for nothing of the kind at the prompt.