フリー問題

問題文

A neighbor advertises a route toward 127.0.0.0/8. The receiving device refuses to install that route, and adding an import policy that accepts the prefix changes nothing. Which category explains the refusal?

選択肢

1. The refusal comes from policy value check on the receiving device.
2. The refusal comes from aggregate route hiding on the receiving device.
3. The refusal comes from instance table split on the receiving device.
4. The refusal comes from martian address blocking on the receiving device.