フリー問題

問題文

A gateway is set up to inspect traffic that arrives inside an encapsulating tunnel. A reviewer asks whether the encapsulation on its own keeps the carried payload private while it crosses the intervening network. Which answer matches the documentation?

選択肢

1. The encapsulation itself conceals nothing of the payload under the outer header, so a second protocol is layered on to supply privacy alongside integrity checking.
2. The encapsulation leaves the payload readable until the outer header is signed, so signing is what turns the carriage into a protected one.
3. The encapsulation conceals the payload under the outer header on its own, so layering a second protocol on brings nothing beyond a longer path for each packet that crosses the intervening network.
4. The encapsulation conceals the payload once the far end strips the outer header, so the exposure lasts for the final hop rather than the whole path.