フリー問題

問題文

An operator writes a route toward 10.20.0.0/16 with a forwarding next hop of 172.16.1.1. No routing protocol runs on that device at all. What puts that route into the routing table?

選択肢

1. The route appears through explicit manual configuration in that routing table.
2. The route appears through dynamic neighbor advertisement in that routing table.
3. The route appears through automatic subnet derivation in that routing table.
4. The route appears through periodic broadcast discovery in that routing table.