フリー問題

問題文

A customer means to carry its own addressed traffic between two sites without letting the provider see or touch the routing of it. Which sort of routing instance on the edge device answers that, and what does it do with that traffic?

選択肢

1. One of the second layer sort, which bears the addressed traffic across after reading it
2. One of the third layer sort, which bears the addressed traffic across without reading it
3. One of the third layer sort, which drops the traffic it cannot resolve
4. One of the second layer sort, which bears the addressed traffic across without reading it