What four metrics are used to determine Overall Host Health?

The correct answer identifies the four key metrics—CPU, Memory, Disk, and Network Interface Controller (NIC)—that are critical for determining the overall health of a host.

CPU utilization provides insights into how much processing power is being used and can indicate whether a host is under heavy load or if resources are available. Memory usage is also vital, as high memory consumption can lead to performance degradation or application failures. Disk performance metrics, such as read/write speeds and latency, reflect how quickly data can be accessed or stored, which is essential for application responsiveness. Lastly, the NIC metric addresses the network performance aspects, including how well the host communicates with other systems, which is crucial for ensuring services remain accessible and efficient.

By analyzing these four metrics, administrators can get a comprehensive view of the host’s operational health and address any issues that may arise before they lead to significant problems.

The other answer choices mix different types of metrics that are not as relevant or comprehensive in assessing overall host health as the selected metrics. For instance, application services, network latency, and cache performance, while important in certain contexts, do not provide a complete picture of the host's overall health compared to CPU, Memory, Disk, and NIC metrics.