フリー問題

問題文

The module that rebuilds a stream before the rules are evaluated offers a choice of operating system behaviors. Why does that choice matter?

選択肢

1. Stacks differ in the size of the buffer they offer, so a rebuild that follows a different stack from the destination examines a stream that stops at a boundary the destination never reaches
2. Stacks differ in the order they answer requests, so a rebuild that follows a different stack from the destination examines the messages in a sequence the destination never uses
3. Stacks differ in which names they use for the same protocol, so a rebuild that follows a different stack from the destination examines a stream labeled with a service the destination never reports
4. Stacks differ in what they keep when two segments cover the same bytes, so a rebuild that follows a different stack from the destination examines a stream the destination never sees