unet latency simulator, 1 way or round trip latency?

I was just wondering if anyone knows if the latency simulator is the 1 way or round trip latency ?

If you set it to say 200, would it be like
Does it actually simulate it to the point where client → server has 100ms latency, then the server → client has another 100ms latency also or is it just something like

client → server is delayed by the 200ms and then server → client has no delay, etc.

one way, moreover you can set different delay for incoming and outcoming traffic

Thanks. I found out about the NetworkClient.GetRTT function and was able to call that to see what latencies the simulator was giving me. ( when i had it set to 100 it was giving me average maybe 250 which is a little higher than I would expect even in the case of the setting being one way, but its fine since I can call the GetRTT function and know what I’m simulating )