The following figure shows the RTTs of all the packets collected from the beginning to the end of a connection chain, where Y axis represents the value of RTTs, and X axis represents the number of...

The following figure shows the RTTs of all the packets collected from the beginning to the end of a connection chain, where Y axis represents the value of RTTs, and X axis represents the number of Send packets. How many hosts are compromised from the detecting host (also called sensor, count this host) in this case?

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Extracted text: 3500 3000 2500 2000 1500 1000 500 50 100 150 200 250 300 350 400 450