新しいオフィスに移動するクライアントは、すべて同じサブネット上にある 412 個のネットワーク接続デバイスに対応するように IP ネットワークをセットアップすることを望んでいます。サブネットはできるだけ小さくする必要があります。必要な結果を得るには、次のサブネット マスクのうちどれを使用する必要がありますか?
正解:B
Explanation 255.255.252.0 is a subnet mask that allows for 1022 network-connected devices on the same subnet, which is the smallest subnet that can accommodate 412 devices. The subnet mask determines how many bits are used for the network portion and how many bits are used for the host portion of an IP address. A smaller subnet mask means more bits are used for the network portion and less bits are used for the host portion, which reduces the number of available hosts on the subnet. 255.255.0.0 allows for 65534 hosts on the same subnet, which is too large. 255.255.254.0 allows for 510 hosts on the same subnet, which is also too large. 255.255.255.0 allows for 254 hosts on the same subnet, which is too small.