ネットワークエンジニアがルータ上でOSPFを設定しています。エンジニアは、 177.16.0.0/16 は OSPF 経由で学習されます。ルーティング テーブルで、コマンド ip prefix-list OFFICE seq S deny 172.16.0.0/16 を使用してプレフィックス リストを設定します。目標を達成するには、2 つの同一の設定コマンドを適用する必要がありますか? (2 つ選択してください。)
正解:A,E
To prevent a route to 172.16.0.0/16 from being learned via OSPF, the network engineer must apply a distribute-list that references the prefix list in the inbound direction of the OSPF process. The command distribute-list prefix OFFICE in under the OSPF process will filter incoming routing updates based on the specified prefix list. Since the prefix list named OFFICE has a sequence that denies the 172.16.0.0/16 prefix, any routes matching this prefix will not be accepted into the OSPF routing table. The distribute-list needs to be applied in both the inbound direction on interfaces receiving OSPF updates (option A) and in the OSPF process itself to filter routes being received from OSPF neighbors (option E).