Host health monitor with UDP + ICMP

Hi F5 expert,

I have previously used to monitor 1 of the host with the UDP port, however if the server goes offline, F5 still mark the host up. Upon checking, I found UDP monitor operation can't detect the host goes offline but only detect the host service port availability. https://support.f5.com/csp/article/K6143

I am thinking to add the monitoring from UDP conjunction with ICMP monitor. But i puzzled with multiple monitoring, if i have 2 monitoring added to monitor the host. F5 will mark the host down either 1 of the monitoring failed or it will only mark the host down when both of the monitoring failed?