A customer would like to manage multiple iLOs from a single dashboard. Which technology is most effective for this purpose?

Managing multiple Integrated Lights-Out (iLO) interfaces from a single dashboard is best achieved through iLO federation. This technology allows multiple servers' iLOs to be grouped together so that administrators can manage them collectively from a unified interface. When using iLO federation, tasks such as firmware updates, configuration changes, and monitoring can be performed on multiple iLOs simultaneously, simplifying management and improving operational efficiency.

In contrast, while other options provide certain functionalities, they do not offer the same level of centralized management capability. For instance, the iLO Shared Network Port primarily provides connectivity options and does not facilitate centralized management of multiple iLOs. HPE OneView does offer management for physical and virtual infrastructure, but its focus is broader and may not specifically target the iLOs of multiple servers. Lastly, iLO Directory Groups are useful for organizing iLOs into manageable sets but do not provide the federation capabilities that streamline management tasks across those groups.

Thus, iLO federation stands out as the most effective technology for managing multiple iLOs seamlessly from a single dashboard, making it the preferred choice in this scenario.