フリー問題

問題文

In the capture an acknowledgment always appears immediately after the frame it confirms, with no other station managing to get in between. Ordinary data frames never manage that. Which pairing explains the difference?

選択肢

1. The acknowledgment gets in first because it waits only the longest gap, while ordinary data has to wait the slotted lapse that interpretation of measured spacing relies upon.
2. The acknowledgment gets in first because it waits only the longest gap, while ordinary data has to wait the randomized lapse that interpretation of measured spacing relies upon.
3. The acknowledgment gets in first because it waits only the shortest gap, while ordinary data has to wait the randomized lapse that interpretation of measured spacing relies upon.
4. The acknowledgment gets in first because it waits only the shortest gap, while ordinary data has to wait the slotted lapse that interpretation of measured spacing relies upon.