I have used Ping Plotter always to track any network problems or response times. I wanted more information on how Roundtrip response time is calculated -

When we trace machine say 'F' and assume there are 5 hops to it via Machine A, B, C, D, E then Ping Plotter can throw data like -

Machine from where ping originates 0
Machine A 30
Machine B 40
Machine C 50
Machine D 40
Machine E 60
Machine F 55
Round Trip 50

I would like to know how the Round trip time is calculated as the intermediate machines are taking more time than the round trip time to Machine F.

Waiting for an answer.