フリー問題

問題文

A device carries an export policy named send-direct at the BGP level of the hierarchy, a policy named send-aggregates under the group internal-peers, and a policy named send-loopbacks under the neighbor 172.16.2.2 of that same group. The team believes that the three run one after another for that neighbor. Which policy or policies does the neighbor 172.16.2.2 actually get?

選択肢

1. send-direct and send-loopbacks, because by default the level of BGP itself is read for every neighbor while the level of the group is read only for a neighbor that carries no policy of its own.
2. All three, in the order send-direct, send-aggregates and send-loopbacks, and the evaluation of that chain ends at the first term whose action is to accept or to reject the prefix it reads.
3. send-aggregates and send-loopbacks, because a policy at the level of a neighbor extends the one at the level of its group, and the level of BGP itself is read for a group that carries nothing at all.
4. Only send-loopbacks, because the most explicit level of the hierarchy takes the place of every level above it.