Refer to the exhibit. Why is the virtual server responsive to incoming connections?

If a pool member is merely disabled, it is explicitly taken out of service by an administrator, but the question implies an active problem preventing responsiveness, not a manual administrative action.

When a pool member's monitor fails, the BIG-IP system marks that specific pool member as unavailable or 'down.' This indicates that the application or service running on that member is not responding correctly to health checks, even if the node itself is still up. A failing pool member monitor directly prevents the virtual server from sending new connections to that member, impacting the virtual server's ability to process incoming connections.

If the node itself (the physical server IP) is disabled, it would mean all pool members on that node are down, which is a broader issue than just a monitor failure for one member.

A node monitor failing means the entire physical server is unreachable or unresponsive at the IP level, which is a more fundamental failure than a pool member specific service failing its application-level check.