What challenge does "Rogue AP detection" address in Aruba networks?

Rogue AP detection specifically targets the issue of unauthorized access points within a network that can pose significant security risks. In an Aruba network, this feature is crucial because rogue access points might be set up by malicious actors or could simply be misconfigured devices, leading to potential vulnerabilities that can be exploited.

These rogue access points may allow for unauthorized access to the network, enabling attackers to intercept sensitive data, launch man-in-the-middle attacks, or even gain control over network resources. By identifying and alerting network administrators to these unauthorized devices, the rogue AP detection ensures that only legitimate access points are connected to the network, significantly enhancing the overall security posture.

The other options address different aspects of network performance and user experience, but they do not specifically relate to the security concern that rogue AP detection resolves. Improving device connectivity, reducing network congestion, and enhancing user experience are all important elements of network management, but they do not directly address the critical issue of unauthorized access that rogue AP detection specifically targets. This makes option B the clear correct choice in the context of securing Aruba networks against potential threats posed by rogue access points.