ユーザーが最近 PC に変更を加えたため、FQDN と IP ローカル リソースの両方で Web サイトにアクセスできなくなりました (ファイル サーバーなどのローカル リソースは引き続きアクセス可能です)。次の設定のうち、ユーザーが誤って構成した可能性が最も高いのはどれですか?
正解:B
The default gateway is the setting that the user most likely misconfigured on the PC that caused it to be unable to access websites by both FQDN and IP. The default gateway is a device, usually a router or a firewall, that connects a local network to other networks such as the Internet. It acts as an intermediary between devices on different networks and forwards packets based on their destination IP addresses. If the default gateway is not configured correctly on a PC, it will not be able to communicate with devices outside its local network, such as web servers or DNS servers. References: https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/16448-default-gateway.html