セキュリティ管理者は、サーバー上で不要なサービスが実行されているのではないかと疑っています。管理者が疑いを確認するために最も使用する可能性が高いツールは次のうちどれですか?
正解:A
Nmap, or Network Mapper, is a network scanning and security auditing tool that is commonly used to discover and map network resources, such as servers and devices, and to identify the services running on those resources. It can be used to scan a single host or a range of hosts to determine which ports are open and which services are running on those ports. This information can be used to identify services that may be unnecessary or potentially insecure, and to take appropriate action to mitigate any security risks. In this case, the administrator can use Nmap to scan the server and confirm whether there are any unnecessary services running on it.