フリー問題

問題文

The specification lists four ways of tying a value to what a router has learned, and they trade the count of values against the work done at the far end. Which option is correct about who makes that choice, about the way that spends the fewest of them, and about the way that ties one of them to a link and a tag together?

選択肢

1. About those options the choice among the four ways rests with the router that reads the route, the way that spends the fewest values still calls for a lookup on the address at the exit, and the way that keys a value to a link and a tag lets the exit read the list alone, as the specification lays out.
2. About those options the choice among the four ways rests with the router that reads the route, the way that spends the fewest values still calls for a lookup on the segment at the exit, and the way that keys a value to a link and a tag lets the exit read the labels alone, as the specification lays out.
3. About those options the choice among the four ways rests with the router that raises the route, the way that spends the fewest values still calls for a lookup on the segment at the exit, and the way that keys a value to a link and a tag lets the exit read the list alone, as the specification lays out.
4. About those options the choice among the four ways rests with the router that raises the route, the way that spends the fewest values still calls for a lookup on the address at the exit, and the way that keys a value to a link and a tag lets the exit read the labels alone, as the specification lays out.